71431601 has 2 divisors, whose sum is σ = 71431602. Its totient is φ = 71431600.

The previous prime is 71431597. The next prime is 71431627. The reversal of 71431601 is 10613417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68046001 + 3385600 = 8249^2 + 1840^2 .

It is a cyclic number.

It is not a de Polignac number, because 71431601 - 2² = 71431597 is a prime.

It is not a weakly prime, because it can be changed into another prime (71437601) 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, 35715800 + 35715801.

It is an arithmetic number, because the mean of its divisors is an integer number (35715801).

Almost surely, 2^71431601 is an apocalyptic number.

It is an amenable number.

71431601 is a deficient number, since it is larger than the sum of its proper divisors (1).

71431601 is an equidigital number, since it uses as much as digits as its factorization.

71431601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 71431601 is about 8451.7217772475. The cubic root of 71431601 is about 414.9191326440.

The spelling of 71431601 in words is "seventy-one million, four hundred thirty-one thousand, six hundred one".