747685457 has 2 divisors, whose sum is σ = 747685458. Its totient is φ = 747685456.

The previous prime is 747685441. The next prime is 747685567. The reversal of 747685457 is 754586747.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 675792016 + 71893441 = 25996^2 + 8479^2 .

It is a cyclic number.

It is not a de Polignac number, because 747685457 - 2⁴ = 747685441 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 747685399 and 747685408.

It is not a weakly prime, because it can be changed into another prime (747685657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 373842728 + 373842729.

It is an arithmetic number, because the mean of its divisors is an integer number (373842729).

Almost surely, 2^747685457 is an apocalyptic number.

It is an amenable number.

747685457 is a deficient number, since it is larger than the sum of its proper divisors (1).

747685457 is an equidigital number, since it uses as much as digits as its factorization.

747685457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6585600, while the sum is 53.

The square root of 747685457 is about 27343.8376421453. The cubic root of 747685457 is about 907.6247102757.

The spelling of 747685457 in words is "seven hundred forty-seven million, six hundred eighty-five thousand, four hundred fifty-seven".