45291989 has 2 divisors, whose sum is σ = 45291990. Its totient is φ = 45291988.

The previous prime is 45291937. The next prime is 45292001. The reversal of 45291989 is 98919254.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39250225 + 6041764 = 6265^2 + 2458^2 .

It is a cyclic number.

It is not a de Polignac number, because 45291989 - 2¹⁶ = 45226453 is a prime.

It is a super-2 number, since 2×45291989² = 4102728535152242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45291929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22645994 + 22645995.

It is an arithmetic number, because the mean of its divisors is an integer number (22645995).

Almost surely, 2^45291989 is an apocalyptic number.

It is an amenable number.

45291989 is a deficient number, since it is larger than the sum of its proper divisors (1).

45291989 is an equidigital number, since it uses as much as digits as its factorization.

45291989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 47.

The square root of 45291989 is about 6729.9323176389. The cubic root of 45291989 is about 356.4569863526.

The spelling of 45291989 in words is "forty-five million, two hundred ninety-one thousand, nine hundred eighty-nine".