70865919 has 12 divisors (see below), whose sum is σ = 102465792. Its totient is φ = 47196000.

The previous prime is 70865869. The next prime is 70865941. The reversal of 70865919 is 91956807.

It is not a de Polignac number, because 70865919 - 2⁷ = 70865791 is a prime.

It is a super-2 number, since 2×70865919² = 10043956951429122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70865219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6939 + ... + 13779.

It is an arithmetic number, because the mean of its divisors is an integer number (8538816).

Almost surely, 2^70865919 is an apocalyptic number.

70865919 is a deficient number, since it is larger than the sum of its proper divisors (31599873).

70865919 is a wasteful number, since it uses less digits than its factorization.

70865919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7998 (or 7995 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 70865919 is about 8418.1897697783. The cubic root of 70865919 is about 413.8209510705.

The spelling of 70865919 in words is "seventy million, eight hundred sixty-five thousand, nine hundred nineteen".