71612791 has 2 divisors, whose sum is σ = 71612792. Its totient is φ = 71612790.

The previous prime is 71612771. The next prime is 71612809. The reversal of 71612791 is 19721617.

It is a strong prime.

It is an emirp because it is prime and its reverse (19721617) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71612791 - 2⁷ = 71612663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71612701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35806395 + 35806396.

It is an arithmetic number, because the mean of its divisors is an integer number (35806396).

Almost surely, 2^71612791 is an apocalyptic number.

71612791 is a deficient number, since it is larger than the sum of its proper divisors (1).

71612791 is an equidigital number, since it uses as much as digits as its factorization.

71612791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5292, while the sum is 34.

The square root of 71612791 is about 8462.4341060950. The cubic root of 71612791 is about 415.2696578116.

The spelling of 71612791 in words is "seventy-one million, six hundred twelve thousand, seven hundred ninety-one".