70989689 has 4 divisors (see below), whose sum is σ = 72640656. Its totient is φ = 69338724.

The previous prime is 70989679. The next prime is 70989697. The reversal of 70989689 is 98698907.

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 a de Polignac number, because none of the positive numbers 2^k-70989689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70989619) 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, 825419 + ... + 825504.

It is an arithmetic number, because the mean of its divisors is an integer number (18160164).

Almost surely, 2^70989689 is an apocalyptic number.

It is an amenable number.

70989689 is a deficient number, since it is larger than the sum of its proper divisors (1650967).

70989689 is a wasteful number, since it uses less digits than its factorization.

70989689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650966.

The product of its (nonzero) digits is 1959552, while the sum is 56.

The square root of 70989689 is about 8425.5379056770. The cubic root of 70989689 is about 414.0617289147.

The spelling of 70989689 in words is "seventy million, nine hundred eighty-nine thousand, six hundred eighty-nine".