91537049 has 2 divisors, whose sum is σ = 91537050. Its totient is φ = 91537048.

The previous prime is 91537031. The next prime is 91537081. The reversal of 91537049 is 94073519.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59783824 + 31753225 = 7732^2 + 5635^2 .

It is a cyclic number.

It is not a de Polignac number, because 91537049 - 2⁸ = 91536793 is a prime.

It is not a weakly prime, because it can be changed into another prime (91537099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45768524 + 45768525.

It is an arithmetic number, because the mean of its divisors is an integer number (45768525).

Almost surely, 2^91537049 is an apocalyptic number.

It is an amenable number.

91537049 is a deficient number, since it is larger than the sum of its proper divisors (1).

91537049 is an equidigital number, since it uses as much as digits as its factorization.

91537049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 91537049 is about 9567.4996211131. The cubic root of 91537049 is about 450.6772501857.

The spelling of 91537049 in words is "ninety-one million, five hundred thirty-seven thousand, forty-nine".