71497031 has 2 divisors, whose sum is σ = 71497032. Its totient is φ = 71497030.

The previous prime is 71497009. The next prime is 71497039. The reversal of 71497031 is 13079417.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71497031 - 2²² = 67302727 is a prime.

It is a super-2 number, since 2×71497031² = 10223650883629922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71497039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35748515 + 35748516.

It is an arithmetic number, because the mean of its divisors is an integer number (35748516).

Almost surely, 2^71497031 is an apocalyptic number.

71497031 is a deficient number, since it is larger than the sum of its proper divisors (1).

71497031 is an equidigital number, since it uses as much as digits as its factorization.

71497031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 71497031 is about 8455.5917001710. The cubic root of 71497031 is about 415.0457800177.

The spelling of 71497031 in words is "seventy-one million, four hundred ninety-seven thousand, thirty-one".