70345939 has 4 divisors (see below), whose sum is σ = 71309656. Its totient is φ = 69382224.

The previous prime is 70345927. The next prime is 70345943. The reversal of 70345939 is 93954307.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93954307 = 1951 ⋅48157.

It is a cyclic number.

It is not a de Polignac number, because 70345939 - 2⁵ = 70345907 is a prime.

It is a super-2 number, since 2×70345939² = 9897102267583442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70345969) 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, 481749 + ... + 481894.

It is an arithmetic number, because the mean of its divisors is an integer number (17827414).

Almost surely, 2^70345939 is an apocalyptic number.

70345939 is a deficient number, since it is larger than the sum of its proper divisors (963717).

70345939 is an equidigital number, since it uses as much as digits as its factorization.

70345939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963716.

The product of its (nonzero) digits is 102060, while the sum is 40.

The square root of 70345939 is about 8387.2485953380. The cubic root of 70345939 is about 412.8063257542.

The spelling of 70345939 in words is "seventy million, three hundred forty-five thousand, nine hundred thirty-nine".