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121610397 = 340536799
BaseRepresentation
bin1110011111110…
…10000010011101
322110211110002210
413033322002131
5222113013042
620022311033
73004446156
oct717720235
9273743083
10121610397
1162711767
1234888479
131c26bc1c
141221892d
15aa22a9c
hex73fa09d

121610397 has 4 divisors (see below), whose sum is σ = 162147200. Its totient is φ = 81073596.

The previous prime is 121610383. The next prime is 121610399. The reversal of 121610397 is 793016121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 793016121 = 3264338707.

It is not a de Polignac number, because 121610397 - 24 = 121610381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121610399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20268397 + ... + 20268402.

It is an arithmetic number, because the mean of its divisors is an integer number (40536800).

Almost surely, 2121610397 is an apocalyptic number.

It is an amenable number.

121610397 is a deficient number, since it is larger than the sum of its proper divisors (40536803).

121610397 is an equidigital number, since it uses as much as digits as its factorization.

121610397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40536802.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 121610397 is about 11027.7104151315. The cubic root of 121610397 is about 495.4390513318.

The spelling of 121610397 in words is "one hundred twenty-one million, six hundred ten thousand, three hundred ninety-seven".

Divisors: 1 3 40536799 121610397