71990995 has 8 divisors (see below), whose sum is σ = 86436000. Its totient is φ = 57561600.

The previous prime is 71990983. The next prime is 71990999. The reversal of 71990995 is 59909917.

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

It is a de Polignac number, because none of the positive numbers 2^k-71990995 is a prime.

It is a super-2 number, since 2×71990995² = 10365406722180050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71990999) 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, 12595 + ... + 17395.

It is an arithmetic number, because the mean of its divisors is an integer number (10804500).

Almost surely, 2^71990995 is an apocalyptic number.

71990995 is a deficient number, since it is larger than the sum of its proper divisors (14445005).

71990995 is a wasteful number, since it uses less digits than its factorization.

71990995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7805.

The product of its (nonzero) digits is 229635, while the sum is 49.

The square root of 71990995 is about 8484.7507329326. The cubic root of 71990995 is about 415.9994202254. Note that the first 3 decimals are identical.

The spelling of 71990995 in words is "seventy-one million, nine hundred ninety thousand, nine hundred ninety-five".