45191957 has 4 divisors (see below), whose sum is σ = 46153536. Its totient is φ = 44230380.

The previous prime is 45191953. The next prime is 45191959. The reversal of 45191957 is 75919154.

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 a cyclic number.

It is not a de Polignac number, because 45191957 - 2² = 45191953 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45191953) 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, 480719 + ... + 480812.

It is an arithmetic number, because the mean of its divisors is an integer number (11538384).

Almost surely, 2^45191957 is an apocalyptic number.

45191957 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

45191957 is a deficient number, since it is larger than the sum of its proper divisors (961579).

45191957 is an equidigital number, since it uses as much as digits as its factorization.

45191957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961578.

The product of its digits is 56700, while the sum is 41.

The square root of 45191957 is about 6722.4963369272. The cubic root of 45191957 is about 356.1943689884.

The spelling of 45191957 in words is "forty-five million, one hundred ninety-one thousand, nine hundred fifty-seven".