70397689 has 4 divisors (see below), whose sum is σ = 70692480. Its totient is φ = 70102900.

The previous prime is 70397669. The next prime is 70397699. The reversal of 70397689 is 98679307.

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.

It is a cyclic number.

It is not a de Polignac number, because 70397689 - 2⁹ = 70397177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70397609) 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, 147037 + ... + 147514.

It is an arithmetic number, because the mean of its divisors is an integer number (17673120).

Almost surely, 2^70397689 is an apocalyptic number.

It is an amenable number.

70397689 is a deficient number, since it is larger than the sum of its proper divisors (294791).

70397689 is a wasteful number, since it uses less digits than its factorization.

70397689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294790.

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 70397689 is about 8390.3330684783. Note that the first 3 decimals coincide. The cubic root of 70397689 is about 412.9075279525.

The spelling of 70397689 in words is "seventy million, three hundred ninety-seven thousand, six hundred eighty-nine".