45139898 has 4 divisors (see below), whose sum is σ = 67709850. Its totient is φ = 22569948.

The previous prime is 45139867. The next prime is 45139909. The reversal of 45139898 is 89893154.

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

It can be written as a sum of positive squares in only one way, i.e., 28058209 + 17081689 = 5297^2 + 4133^2 .

It is a super-2 number, since 2×45139898² = 4075220782900808, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11284973 + ... + 11284976.

Almost surely, 2^45139898 is an apocalyptic number.

45139898 is a deficient number, since it is larger than the sum of its proper divisors (22569952).

45139898 is a wasteful number, since it uses less digits than its factorization.

45139898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22569951.

The product of its digits is 311040, while the sum is 47.

The square root of 45139898 is about 6718.6232220597. The cubic root of 45139898 is about 356.0575434062.

The spelling of 45139898 in words is "forty-five million, one hundred thirty-nine thousand, eight hundred ninety-eight".