445660997 has 4 divisors (see below), whose sum is σ = 449749740. Its totient is φ = 441572256.

The previous prime is 445660973. The next prime is 445661023. The reversal of 445660997 is 799066544.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 272712196 + 172948801 = 16514^2 + 13151^2 .

It is a cyclic number.

It is not a de Polignac number, because 445660997 - 2⁸ = 445660741 is a prime.

It is a super-2 number, since 2×445660997² = 397227448494068018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445660927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2044208 + ... + 2044425.

It is an arithmetic number, because the mean of its divisors is an integer number (112437435).

Almost surely, 2^445660997 is an apocalyptic number.

It is an amenable number.

445660997 is a deficient number, since it is larger than the sum of its proper divisors (4088743).

445660997 is a wasteful number, since it uses less digits than its factorization.

445660997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4088742.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The square root of 445660997 is about 21110.6844275594. The cubic root of 445660997 is about 763.8384965354.

The spelling of 445660997 in words is "four hundred forty-five million, six hundred sixty thousand, nine hundred ninety-seven".