91542413 has 2 divisors, whose sum is σ = 91542414. Its totient is φ = 91542412.

The previous prime is 91542401. The next prime is 91542419. The reversal of 91542413 is 31424519.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48469444 + 43072969 = 6962^2 + 6563^2 .

It is a cyclic number.

It is not a de Polignac number, because 91542413 - 2²² = 87348109 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91542419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45771206 + 45771207.

It is an arithmetic number, because the mean of its divisors is an integer number (45771207).

Almost surely, 2^91542413 is an apocalyptic number.

It is an amenable number.

91542413 is a deficient number, since it is larger than the sum of its proper divisors (1).

91542413 is an equidigital number, since it uses as much as digits as its factorization.

91542413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 29.

The square root of 91542413 is about 9567.7799410313. The cubic root of 91542413 is about 450.6860531261.

The spelling of 91542413 in words is "ninety-one million, five hundred forty-two thousand, four hundred thirteen".