445257669 has 4 divisors (see below), whose sum is σ = 593676896. Its totient is φ = 296838444.

The previous prime is 445257661. The next prime is 445257671. The reversal of 445257669 is 966752544.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 445257669 - 2³ = 445257661 is a prime.

It is a super-2 number, since 2×445257669² = 396508783606627122, 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 (445257661) 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, 74209609 + ... + 74209614.

It is an arithmetic number, because the mean of its divisors is an integer number (148419224).

Almost surely, 2^445257669 is an apocalyptic number.

It is an amenable number.

445257669 is a deficient number, since it is larger than the sum of its proper divisors (148419227).

445257669 is a wasteful number, since it uses less digits than its factorization.

445257669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148419226.

The product of its digits is 1814400, while the sum is 48.

The square root of 445257669 is about 21101.1295669213. The cubic root of 445257669 is about 763.6079996332.

The spelling of 445257669 in words is "four hundred forty-five million, two hundred fifty-seven thousand, six hundred sixty-nine".