91758361 has 2 divisors, whose sum is σ = 91758362. Its totient is φ = 91758360.

The previous prime is 91758347. The next prime is 91758371. The reversal of 91758361 is 16385719.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67551961 + 24206400 = 8219^2 + 4920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91758361 is a prime.

It is not a weakly prime, because it can be changed into another prime (91758301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45879180 + 45879181.

It is an arithmetic number, because the mean of its divisors is an integer number (45879181).

Almost surely, 2^91758361 is an apocalyptic number.

It is an amenable number.

91758361 is a deficient number, since it is larger than the sum of its proper divisors (1).

91758361 is an equidigital number, since it uses as much as digits as its factorization.

91758361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 40.

The square root of 91758361 is about 9579.0584610389. The cubic root of 91758361 is about 451.0401633840.

The spelling of 91758361 in words is "ninety-one million, seven hundred fifty-eight thousand, three hundred sixty-one".