91925689 has 2 divisors, whose sum is σ = 91925690. Its totient is φ = 91925688.

The previous prime is 91925683. The next prime is 91925831. The reversal of 91925689 is 98652919.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82955664 + 8970025 = 9108^2 + 2995^2 .

It is an emirp because it is prime and its reverse (98652919) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91925689 - 2⁵ = 91925657 is a prime.

It is not a weakly prime, because it can be changed into another prime (91925683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45962844 + 45962845.

It is an arithmetic number, because the mean of its divisors is an integer number (45962845).

Almost surely, 2^91925689 is an apocalyptic number.

It is an amenable number.

91925689 is a deficient number, since it is larger than the sum of its proper divisors (1).

91925689 is an equidigital number, since it uses as much as digits as its factorization.

91925689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 49.

The square root of 91925689 is about 9587.7885354236. The cubic root of 91925689 is about 451.3141650047.

The spelling of 91925689 in words is "ninety-one million, nine hundred twenty-five thousand, six hundred eighty-nine".