70897739 has 8 divisors (see below), whose sum is σ = 77737968. Its totient is φ = 64123360.

The previous prime is 70897709. The next prime is 70897747. The reversal of 70897739 is 93779807.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 70897739 - 2⁸ = 70897483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70897709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14192 + ... + 18525.

It is an arithmetic number, because the mean of its divisors is an integer number (9717246).

Almost surely, 2^70897739 is an apocalyptic number.

70897739 is a deficient number, since it is larger than the sum of its proper divisors (6840229).

70897739 is a wasteful number, since it uses less digits than its factorization.

70897739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32925.

The product of its (nonzero) digits is 666792, while the sum is 50.

The square root of 70897739 is about 8420.0795126887. The cubic root of 70897739 is about 413.8828793453.

The spelling of 70897739 in words is "seventy million, eight hundred ninety-seven thousand, seven hundred thirty-nine".