71613427 has 2 divisors, whose sum is σ = 71613428. Its totient is φ = 71613426.

The previous prime is 71613403. The next prime is 71613431. The reversal of 71613427 is 72431617.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71613427 is a prime.

It is not a weakly prime, because it can be changed into another prime (71613497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35806713 + 35806714.

It is an arithmetic number, because the mean of its divisors is an integer number (35806714).

Almost surely, 2^71613427 is an apocalyptic number.

71613427 is a deficient number, since it is larger than the sum of its proper divisors (1).

71613427 is an equidigital number, since it uses as much as digits as its factorization.

71613427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 31.

The square root of 71613427 is about 8462.4716838522. The cubic root of 71613427 is about 415.2708871577.

The spelling of 71613427 in words is "seventy-one million, six hundred thirteen thousand, four hundred twenty-seven".