45209971 has 2 divisors, whose sum is σ = 45209972. Its totient is φ = 45209970.

The previous prime is 45209959. The next prime is 45209993. The reversal of 45209971 is 17990254.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45209971 - 2¹⁷ = 45078899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 45209971.

It is not a weakly prime, because it can be changed into another prime (45209951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22604985 + 22604986.

It is an arithmetic number, because the mean of its divisors is an integer number (22604986).

Almost surely, 2^45209971 is an apocalyptic number.

45209971 is a deficient number, since it is larger than the sum of its proper divisors (1).

45209971 is an equidigital number, since it uses as much as digits as its factorization.

45209971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 45209971 is about 6723.8360330990. The cubic root of 45209971 is about 356.2416903366.

The spelling of 45209971 in words is "forty-five million, two hundred nine thousand, nine hundred seventy-one".