70938121 has 2 divisors, whose sum is σ = 70938122. Its totient is φ = 70938120.

The previous prime is 70938113. The next prime is 70938143. The reversal of 70938121 is 12183907.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69806025 + 1132096 = 8355^2 + 1064^2 .

It is an emirp because it is prime and its reverse (12183907) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70938121 - 2³ = 70938113 is a prime.

It is a super-2 number, since 2×70938121² = 10064434022021282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (70938421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35469060 + 35469061.

It is an arithmetic number, because the mean of its divisors is an integer number (35469061).

Almost surely, 2^70938121 is an apocalyptic number.

It is an amenable number.

70938121 is a deficient number, since it is larger than the sum of its proper divisors (1).

70938121 is an equidigital number, since it uses as much as digits as its factorization.

70938121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 70938121 is about 8422.4771296810. The cubic root of 70938121 is about 413.9614443623.

The spelling of 70938121 in words is "seventy million, nine hundred thirty-eight thousand, one hundred twenty-one".