747061657 has 4 divisors (see below), whose sum is σ = 747607140. Its totient is φ = 746516176.

The previous prime is 747061649. The next prime is 747061687. The reversal of 747061657 is 756160747.

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

It can be written as a sum of positive squares in 2 ways, for example, as 464014681 + 283046976 = 21541^2 + 16824^2 .

It is a cyclic number.

It is not a de Polignac number, because 747061657 - 2³ = 747061649 is a prime.

It is a super-2 number, since 2×747061657² = 1116202238719171298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (747061607) 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 3 ways as a sum of consecutive naturals, for example, 270682 + ... + 273427.

It is an arithmetic number, because the mean of its divisors is an integer number (186901785).

Almost surely, 2^747061657 is an apocalyptic number.

It is an amenable number.

747061657 is a deficient number, since it is larger than the sum of its proper divisors (545483).

747061657 is a wasteful number, since it uses less digits than its factorization.

747061657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545482.

The product of its (nonzero) digits is 246960, while the sum is 43.

The square root of 747061657 is about 27332.4286699883. The cubic root of 747061657 is about 907.3722271773.

The spelling of 747061657 in words is "seven hundred forty-seven million, sixty-one thousand, six hundred fifty-seven".