747309889 has 2 divisors, whose sum is σ = 747309890. Its totient is φ = 747309888.

The previous prime is 747309887. The next prime is 747309923. The reversal of 747309889 is 988903747.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 686859264 + 60450625 = 26208^2 + 7775^2 .

It is a cyclic number.

It is not a de Polignac number, because 747309889 - 2¹ = 747309887 is a prime.

Together with 747309887, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (747309887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 373654944 + 373654945.

It is an arithmetic number, because the mean of its divisors is an integer number (373654945).

Almost surely, 2^747309889 is an apocalyptic number.

It is an amenable number.

747309889 is a deficient number, since it is larger than the sum of its proper divisors (1).

747309889 is an equidigital number, since it uses as much as digits as its factorization.

747309889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The square root of 747309889 is about 27336.9692723974. The cubic root of 747309889 is about 907.4727159290.

The spelling of 747309889 in words is "seven hundred forty-seven million, three hundred nine thousand, eight hundred eighty-nine".