46389721 has 15 divisors (see below), whose sum is σ = 54510261. Its totient is φ = 39476556.

The previous prime is 46389709. The next prime is 46389727. The reversal of 46389721 is 12798364.

The square root of 46389721 is 6811.

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

It is not a de Polignac number, because 46389721 - 2¹¹ = 46387673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (46389727) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 333670 + ... + 333808.

Almost surely, 2^46389721 is an apocalyptic number.

46389721 is the 6811-st square number.

46389721 is the 3406-th centered octagonal number.

It is an amenable number.

46389721 is a deficient number, since it is larger than the sum of its proper divisors (8120540).

46389721 is an frugal number, since it uses more digits than its factorization.

46389721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 146 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The cubic root of 46389721 is about 359.3138189586.

The spelling of 46389721 in words is "forty-six million, three hundred eighty-nine thousand, seven hundred twenty-one".