71291297 has 16 divisors (see below), whose sum is σ = 89164800. Its totient is φ = 55375440.

The previous prime is 71291263. The next prime is 71291317. The reversal of 71291297 is 79219217.

It is a cyclic number.

It is not a de Polignac number, because 71291297 - 2²⁶ = 4182433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71291297.

It is not an unprimeable number, because it can be changed into a prime (71291257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26354 + ... + 28932.

It is an arithmetic number, because the mean of its divisors is an integer number (5572800).

Almost surely, 2^71291297 is an apocalyptic number.

71291297 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

71291297 is a deficient number, since it is larger than the sum of its proper divisors (17873503).

71291297 is a wasteful number, since it uses less digits than its factorization.

71291297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2956.

The product of its digits is 15876, while the sum is 38.

The square root of 71291297 is about 8443.4173768682. The cubic root of 71291297 is about 414.6472969789.

The spelling of 71291297 in words is "seventy-one million, two hundred ninety-one thousand, two hundred ninety-seven".