75775631 has 2 divisors, whose sum is σ = 75775632. Its totient is φ = 75775630.

The previous prime is 75775619. The next prime is 75775633. The reversal of 75775631 is 13657757.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 75775631 - 2²² = 71581327 is a prime.

It is a super-2 number, since 2×75775631² = 11483892506896322, which contains 22 as substring.

Together with 75775633, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75775633) 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, 37887815 + 37887816.

It is an arithmetic number, because the mean of its divisors is an integer number (37887816).

Almost surely, 2^75775631 is an apocalyptic number.

75775631 is a deficient number, since it is larger than the sum of its proper divisors (1).

75775631 is an equidigital number, since it uses as much as digits as its factorization.

75775631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 154350, while the sum is 41.

The square root of 75775631 is about 8704.9199307059. The cubic root of 75775631 is about 423.1651109295.

The spelling of 75775631 in words is "seventy-five million, seven hundred seventy-five thousand, six hundred thirty-one".