45436981 has 2 divisors, whose sum is σ = 45436982. Its totient is φ = 45436980.

The previous prime is 45436969. The next prime is 45436987. The reversal of 45436981 is 18963454.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31820881 + 13616100 = 5641^2 + 3690^2 .

It is a cyclic number.

It is not a de Polignac number, because 45436981 - 2¹⁵ = 45404213 is a prime.

It is a super-2 number, since 2×45436981² = 4129038484788722, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45436987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22718490 + 22718491.

It is an arithmetic number, because the mean of its divisors is an integer number (22718491).

Almost surely, 2^45436981 is an apocalyptic number.

It is an amenable number.

45436981 is a deficient number, since it is larger than the sum of its proper divisors (1).

45436981 is an equidigital number, since it uses as much as digits as its factorization.

45436981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 40.

The square root of 45436981 is about 6740.6958839574. The cubic root of 45436981 is about 356.8369531671.

The spelling of 45436981 in words is "forty-five million, four hundred thirty-six thousand, nine hundred eighty-one".