746630721 has 6 divisors (see below), whose sum is σ = 1078466610. Its totient is φ = 497753808.

The previous prime is 746630719. The next prime is 746630737. The reversal of 746630721 is 127036647.

It can be written as a sum of positive squares in only one way, i.e., 699020721 + 47610000 = 26439^2 + 6900^2 .

It is not a de Polignac number, because 746630721 - 2¹ = 746630719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (746630711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41479476 + ... + 41479493.

It is an arithmetic number, because the mean of its divisors is an integer number (179744435).

Almost surely, 2^746630721 is an apocalyptic number.

It is an amenable number.

746630721 is a deficient number, since it is larger than the sum of its proper divisors (331835889).

746630721 is a wasteful number, since it uses less digits than its factorization.

746630721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82958975 (or 82958972 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 746630721 is about 27324.5442962916. The cubic root of 746630721 is about 907.1977237014.

The spelling of 746630721 in words is "seven hundred forty-six million, six hundred thirty thousand, seven hundred twenty-one".