45971591 has 2 divisors, whose sum is σ = 45971592. Its totient is φ = 45971590.

The previous prime is 45971573. The next prime is 45971623. The reversal of 45971591 is 19517954.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45971591 is a prime.

It is a super-2 number, since 2×45971591² = 4226774358142562, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45971551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22985795 + 22985796.

It is an arithmetic number, because the mean of its divisors is an integer number (22985796).

Almost surely, 2^45971591 is an apocalyptic number.

45971591 is a deficient number, since it is larger than the sum of its proper divisors (1).

45971591 is an equidigital number, since it uses as much as digits as its factorization.

45971591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 41.

The square root of 45971591 is about 6780.2353204000. The cubic root of 45971591 is about 358.2310104574.

The spelling of 45971591 in words is "forty-five million, nine hundred seventy-one thousand, five hundred ninety-one".