747271557 has 12 divisors (see below), whose sum is σ = 1082290924. Its totient is φ = 496843200.

The previous prime is 747271549. The next prime is 747271559. The reversal of 747271557 is 755172747.

747271557 is a `hidden beast` number, since 74 + 7 + 27 + 1 + 557 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 205033761 + 542237796 = 14319^2 + 23286^2 .

It is not a de Polignac number, because 747271557 - 2³ = 747271549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747271559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107944 + ... + 114657.

Almost surely, 2^747271557 is an apocalyptic number.

It is an amenable number.

747271557 is a deficient number, since it is larger than the sum of its proper divisors (335019367).

747271557 is a wasteful number, since it uses less digits than its factorization.

747271557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222980 (or 222977 counting only the distinct ones).

The product of its digits is 480200, while the sum is 45.

The square root of 747271557 is about 27336.2681615469. The cubic root of 747271557 is about 907.4571999030.

The spelling of 747271557 in words is "seven hundred forty-seven million, two hundred seventy-one thousand, five hundred fifty-seven".