45531637 has 2 divisors, whose sum is σ = 45531638. Its totient is φ = 45531636.

The previous prime is 45531631. The next prime is 45531649. The reversal of 45531637 is 73613554.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38514436 + 7017201 = 6206^2 + 2649^2 .

It is a cyclic number.

It is not a de Polignac number, because 45531637 - 2¹⁹ = 45007349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45531631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22765818 + 22765819.

It is an arithmetic number, because the mean of its divisors is an integer number (22765819).

Almost surely, 2^45531637 is an apocalyptic number.

It is an amenable number.

45531637 is a deficient number, since it is larger than the sum of its proper divisors (1).

45531637 is an equidigital number, since it uses as much as digits as its factorization.

45531637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 34.

The square root of 45531637 is about 6747.7134645745. The cubic root of 45531637 is about 357.0845732775.

The spelling of 45531637 in words is "forty-five million, five hundred thirty-one thousand, six hundred thirty-seven".