45049621 has 2 divisors, whose sum is σ = 45049622. Its totient is φ = 45049620.

The previous prime is 45049619. The next prime is 45049637. The reversal of 45049621 is 12694054.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45037521 + 12100 = 6711^2 + 110^2 .

It is a cyclic number.

It is not a de Polignac number, because 45049621 - 2¹ = 45049619 is a prime.

Together with 45049619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45049691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22524810 + 22524811.

It is an arithmetic number, because the mean of its divisors is an integer number (22524811).

Almost surely, 2^45049621 is an apocalyptic number.

It is an amenable number.

45049621 is a deficient number, since it is larger than the sum of its proper divisors (1).

45049621 is an equidigital number, since it uses as much as digits as its factorization.

45049621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 45049621 is about 6711.9014444493. The cubic root of 45049621 is about 355.8200206481.

The spelling of 45049621 in words is "forty-five million, forty-nine thousand, six hundred twenty-one".