45720643 has 2 divisors, whose sum is σ = 45720644. Its totient is φ = 45720642.

The previous prime is 45720611. The next prime is 45720671. The reversal of 45720643 is 34602754.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 45720643 - 2⁵ = 45720611 is a prime.

It is not a weakly prime, because it can be changed into another prime (45720673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22860321 + 22860322.

It is an arithmetic number, because the mean of its divisors is an integer number (22860322).

Almost surely, 2^45720643 is an apocalyptic number.

45720643 is a deficient number, since it is larger than the sum of its proper divisors (1).

45720643 is an equidigital number, since it uses as much as digits as its factorization.

45720643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 45720643 is about 6761.7041491032. The cubic root of 45720643 is about 357.5779881042.

The spelling of 45720643 in words is "forty-five million, seven hundred twenty thousand, six hundred forty-three".