45721898 has 4 divisors (see below), whose sum is σ = 68582850. Its totient is φ = 22860948.

The previous prime is 45721883. The next prime is 45721919. The reversal of 45721898 is 89812754.

45721898 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 43864129 + 1857769 = 6623^2 + 1363^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11430473 + ... + 11430476.

Almost surely, 2^45721898 is an apocalyptic number.

45721898 is a deficient number, since it is larger than the sum of its proper divisors (22860952).

45721898 is a wasteful number, since it uses less digits than its factorization.

45721898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22860951.

The product of its digits is 161280, while the sum is 44.

The square root of 45721898 is about 6761.7969505154. The cubic root of 45721898 is about 357.5812598303.

The spelling of 45721898 in words is "forty-five million, seven hundred twenty-one thousand, eight hundred ninety-eight".