727426621 has 2 divisors, whose sum is σ = 727426622. Its totient is φ = 727426620.

The previous prime is 727426613. The next prime is 727426627. The reversal of 727426621 is 126624727.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 621953721 + 105472900 = 24939^2 + 10270^2 .

It is an emirp because it is prime and its reverse (126624727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 727426621 - 2³ = 727426613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (727426627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363713310 + 363713311.

It is an arithmetic number, because the mean of its divisors is an integer number (363713311).

Almost surely, 2^727426621 is an apocalyptic number.

It is an amenable number.

727426621 is a deficient number, since it is larger than the sum of its proper divisors (1).

727426621 is an equidigital number, since it uses as much as digits as its factorization.

727426621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 37.

The square root of 727426621 is about 26970.8476136735. The cubic root of 727426621 is about 899.3520525577.

The spelling of 727426621 in words is "seven hundred twenty-seven million, four hundred twenty-six thousand, six hundred twenty-one".