747610621 has 2 divisors, whose sum is σ = 747610622. Its totient is φ = 747610620.

The previous prime is 747610597. The next prime is 747610627. The reversal of 747610621 is 126016747.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 721996900 + 25613721 = 26870^2 + 5061^2 .

It is a cyclic number.

It is not a de Polignac number, because 747610621 - 2⁹ = 747610109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (747610627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 373805310 + 373805311.

It is an arithmetic number, because the mean of its divisors is an integer number (373805311).

Almost surely, 2^747610621 is an apocalyptic number.

It is an amenable number.

747610621 is a deficient number, since it is larger than the sum of its proper divisors (1).

747610621 is an equidigital number, since it uses as much as digits as its factorization.

747610621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 747610621 is about 27342.4691825738. The cubic root of 747610621 is about 907.5944278138.

The spelling of 747610621 in words is "seven hundred forty-seven million, six hundred ten thousand, six hundred twenty-one".