45977909 has 4 divisors (see below), whose sum is σ = 46039404. Its totient is φ = 45916416.

The previous prime is 45977887. The next prime is 45977947. The reversal of 45977909 is 90977954.

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 30217009 + 15760900 = 5497^2 + 3970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45977909 is a prime.

It is a super-2 number, since 2×45977909² = 4227936232024562, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45977959) 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, 29612 + ... + 31125.

It is an arithmetic number, because the mean of its divisors is an integer number (11509851).

Almost surely, 2^45977909 is an apocalyptic number.

It is an amenable number.

45977909 is a deficient number, since it is larger than the sum of its proper divisors (61495).

45977909 is an equidigital number, since it uses as much as digits as its factorization.

45977909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61494.

The product of its (nonzero) digits is 714420, while the sum is 50.

The square root of 45977909 is about 6780.7012174258. The cubic root of 45977909 is about 358.2474205909.

The spelling of 45977909 in words is "forty-five million, nine hundred seventy-seven thousand, nine hundred nine".