45198729 has 27 divisors (see below), whose sum is σ = 68621293. Its totient is φ = 29769444.

The previous prime is 45198721. The next prime is 45198731. The reversal of 45198729 is 92789154.

The square root of 45198729 is 6723.

It is a perfect power (a square), and thus also a powerful number.

45198729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (27).

It is not a de Polignac number, because 45198729 - 2³ = 45198721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45198721) by changing a digit.

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 in 26 ways as a sum of consecutive naturals, for example, 544522 + ... + 544604.

Almost surely, 2^45198729 is an apocalyptic number.

45198729 is the 6723-rd square number.

45198729 is the 3362-nd centered octagonal number.

It is an amenable number.

45198729 is a deficient number, since it is larger than the sum of its proper divisors (23422564).

45198729 is an frugal number, since it uses more digits than its factorization.

45198729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 86 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The cubic root of 45198729 is about 356.2121599698.

The spelling of 45198729 in words is "forty-five million, one hundred ninety-eight thousand, seven hundred twenty-nine".