123353591 has 2 divisors, whose sum is σ = 123353592. Its totient is φ = 123353590.

The previous prime is 123353579. The next prime is 123353599. The reversal of 123353591 is 195353321.

It is a strong prime.

It is an emirp because it is prime and its reverse (195353321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123353591 - 2¹⁸ = 123091447 is a prime.

It is a super-2 number, since 2×123353591² = 30432216825190562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123353599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61676795 + 61676796.

It is an arithmetic number, because the mean of its divisors is an integer number (61676796).

Almost surely, 2^123353591 is an apocalyptic number.

123353591 is a deficient number, since it is larger than the sum of its proper divisors (1).

123353591 is an equidigital number, since it uses as much as digits as its factorization.

123353591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12150, while the sum is 32.

The square root of 123353591 is about 11106.4661796631. The cubic root of 123353591 is about 497.7950789390.

The spelling of 123353591 in words is "one hundred twenty-three million, three hundred fifty-three thousand, five hundred ninety-one".