45479991 has 4 divisors (see below), whose sum is σ = 60639992. Its totient is φ = 30319992.

The previous prime is 45479983. The next prime is 45480013. The reversal of 45479991 is 19997454.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 45479991 - 2³ = 45479983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45479991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45479911) 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, 7579996 + ... + 7580001.

It is an arithmetic number, because the mean of its divisors is an integer number (15159998).

Almost surely, 2^45479991 is an apocalyptic number.

45479991 is a deficient number, since it is larger than the sum of its proper divisors (15160001).

45479991 is a wasteful number, since it uses less digits than its factorization.

45479991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15160000.

The product of its digits is 408240, while the sum is 48.

The square root of 45479991 is about 6743.8854527639. The cubic root of 45479991 is about 356.9495099213.

The spelling of 45479991 in words is "forty-five million, four hundred seventy-nine thousand, nine hundred ninety-one".