45387857 has 4 divisors (see below), whose sum is σ = 45407796. Its totient is φ = 45367920.

The previous prime is 45387851. The next prime is 45387883. The reversal of 45387857 is 75878354.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75878354 = 2 ⋅37939177.

It can be written as a sum of positive squares in 2 ways, for example, as 37994896 + 7392961 = 6164^2 + 2719^2 .

It is a cyclic number.

It is not a de Polignac number, because 45387857 - 2¹⁸ = 45125713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45387851) 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, 6038 + ... + 11279.

It is an arithmetic number, because the mean of its divisors is an integer number (11351949).

Almost surely, 2^45387857 is an apocalyptic number.

It is an amenable number.

45387857 is a deficient number, since it is larger than the sum of its proper divisors (19939).

45387857 is a wasteful number, since it uses less digits than its factorization.

45387857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19938.

The product of its digits is 940800, while the sum is 47.

The square root of 45387857 is about 6737.0510611097. The cubic root of 45387857 is about 356.7083092070.

The spelling of 45387857 in words is "forty-five million, three hundred eighty-seven thousand, eight hundred fifty-seven".