91825673 has 2 divisors, whose sum is σ = 91825674. Its totient is φ = 91825672.

The previous prime is 91825621. The next prime is 91825681. The reversal of 91825673 is 37652819.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84787264 + 7038409 = 9208^2 + 2653^2 .

It is an emirp because it is prime and its reverse (37652819) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91825673 - 2¹² = 91821577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91825673.

It is not a weakly prime, because it can be changed into another prime (91825693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45912836 + 45912837.

It is an arithmetic number, because the mean of its divisors is an integer number (45912837).

Almost surely, 2^91825673 is an apocalyptic number.

It is an amenable number.

91825673 is a deficient number, since it is larger than the sum of its proper divisors (1).

91825673 is an equidigital number, since it uses as much as digits as its factorization.

91825673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 91825673 is about 9582.5713146316. The cubic root of 91825673 is about 451.1504276123.

The spelling of 91825673 in words is "ninety-one million, eight hundred twenty-five thousand, six hundred seventy-three".