45399657 has 4 divisors (see below), whose sum is σ = 60532880. Its totient is φ = 30266436.

The previous prime is 45399637. The next prime is 45399691. The reversal of 45399657 is 75699354.

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 45399657 - 2¹⁸ = 45137513 is a prime.

It is a super-2 number, since 2×45399657² = 4122257711435298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45399637) 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, 7566607 + ... + 7566612.

It is an arithmetic number, because the mean of its divisors is an integer number (15133220).

Almost surely, 2^45399657 is an apocalyptic number.

It is an amenable number.

45399657 is a deficient number, since it is larger than the sum of its proper divisors (15133223).

45399657 is a wasteful number, since it uses less digits than its factorization.

45399657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15133222.

The product of its digits is 1020600, while the sum is 48.

The square root of 45399657 is about 6737.9267582840. The cubic root of 45399657 is about 356.7392190407.

It can be divided in two parts, 45399 and 657, that added together give a triangular number (46056 = T₃₀₃).

The spelling of 45399657 in words is "forty-five million, three hundred ninety-nine thousand, six hundred fifty-seven".