71490959 has 4 divisors (see below), whose sum is σ = 71542080. Its totient is φ = 71439840.

The previous prime is 71490953. The next prime is 71490973. The reversal of 71490959 is 95909417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95909417 = 211 ⋅454547.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71490959 is a prime.

It is a super-2 number, since 2×71490959² = 10221914437479362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71490953) 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, 23402 + ... + 26279.

It is an arithmetic number, because the mean of its divisors is an integer number (17885520).

Almost surely, 2^71490959 is an apocalyptic number.

71490959 is a deficient number, since it is larger than the sum of its proper divisors (51121).

71490959 is a wasteful number, since it uses less digits than its factorization.

71490959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51120.

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 71490959 is about 8455.2326402057. The cubic root of 71490959 is about 415.0340302089.

The spelling of 71490959 in words is "seventy-one million, four hundred ninety thousand, nine hundred fifty-nine".