45490691 has 4 divisors (see below), whose sum is σ = 48166632. Its totient is φ = 42814752.

The previous prime is 45490673. The next prime is 45490699. The reversal of 45490691 is 19609454.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19609454 = 2 ⋅9804727.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45490691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45490699) 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, 1337945 + ... + 1337978.

It is an arithmetic number, because the mean of its divisors is an integer number (12041658).

Almost surely, 2^45490691 is an apocalyptic number.

45490691 is a deficient number, since it is larger than the sum of its proper divisors (2675941).

45490691 is a wasteful number, since it uses less digits than its factorization.

45490691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675940.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 45490691 is about 6744.6787173297. The cubic root of 45490691 is about 356.9775006940.

The spelling of 45490691 in words is "forty-five million, four hundred ninety thousand, six hundred ninety-one".