45981691 has 8 divisors (see below), whose sum is σ = 55316480. Its totient is φ = 37338408.

The previous prime is 45981679. The next prime is 45981697. The reversal of 45981691 is 19618954.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45981691 - 2¹⁵ = 45948923 is a prime.

It is a super-2 number, since 2×45981691² = 4228631814438962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45981697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172731 + ... + 172996.

It is an arithmetic number, because the mean of its divisors is an integer number (6914560).

Almost surely, 2^45981691 is an apocalyptic number.

45981691 is a deficient number, since it is larger than the sum of its proper divisors (9334789).

45981691 is a wasteful number, since it uses less digits than its factorization.

45981691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345753.

The product of its digits is 77760, while the sum is 43.

The square root of 45981691 is about 6780.9800914027. The cubic root of 45981691 is about 358.2572430950.

The spelling of 45981691 in words is "forty-five million, nine hundred eighty-one thousand, six hundred ninety-one".