71970065 has 16 divisors (see below), whose sum is σ = 89496576. Its totient is φ = 55502400.

The previous prime is 71970037. The next prime is 71970077. The reversal of 71970065 is 56007917.

It is not a de Polignac number, because 71970065 - 2⁸ = 71969809 is a prime.

It is a super-2 number, since 2×71970065² = 10359380512208450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47459 + ... + 48951.

It is an arithmetic number, because the mean of its divisors is an integer number (5593536).

Almost surely, 2^71970065 is an apocalyptic number.

It is an amenable number.

71970065 is a deficient number, since it is larger than the sum of its proper divisors (17526511).

71970065 is a wasteful number, since it uses less digits than its factorization.

71970065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840.

The product of its (nonzero) digits is 13230, while the sum is 35.

The square root of 71970065 is about 8483.5172540639. The cubic root of 71970065 is about 415.9591017023.

The spelling of 71970065 in words is "seventy-one million, nine hundred seventy thousand, sixty-five".