747136409 has 2 divisors, whose sum is σ = 747136410. Its totient is φ = 747136408.

The previous prime is 747136339. The next prime is 747136427. The reversal of 747136409 is 904631747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 661518400 + 85618009 = 25720^2 + 9253^2 .

It is an emirp because it is prime and its reverse (904631747) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 747136409 - 2¹⁶ = 747070873 is a prime.

It is not a weakly prime, because it can be changed into another prime (747136459) 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 as a sum of consecutive naturals, namely, 373568204 + 373568205.

It is an arithmetic number, because the mean of its divisors is an integer number (373568205).

Almost surely, 2^747136409 is an apocalyptic number.

It is an amenable number.

747136409 is a deficient number, since it is larger than the sum of its proper divisors (1).

747136409 is an equidigital number, since it uses as much as digits as its factorization.

747136409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 747136409 is about 27333.7960956761. The cubic root of 747136409 is about 907.4024904654.

The spelling of 747136409 in words is "seven hundred forty-seven million, one hundred thirty-six thousand, four hundred nine".