45775621 has 2 divisors, whose sum is σ = 45775622. Its totient is φ = 45775620.

The previous prime is 45775591. The next prime is 45775643. The reversal of 45775621 is 12657754.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43744996 + 2030625 = 6614^2 + 1425^2 .

It is a cyclic number.

It is not a de Polignac number, because 45775621 - 2¹³ = 45767429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45775661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22887810 + 22887811.

It is an arithmetic number, because the mean of its divisors is an integer number (22887811).

Almost surely, 2^45775621 is an apocalyptic number.

It is an amenable number.

45775621 is a deficient number, since it is larger than the sum of its proper divisors (1).

45775621 is an equidigital number, since it uses as much as digits as its factorization.

45775621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58800, while the sum is 37.

The square root of 45775621 is about 6765.7683229623. The cubic root of 45775621 is about 357.7212570727.

The spelling of 45775621 in words is "forty-five million, seven hundred seventy-five thousand, six hundred twenty-one".