721901339359 has 4 divisors (see below), whose sum is σ = 722958296616. Its totient is φ = 720844382104.

The previous prime is 721901339281. The next prime is 721901339377. The reversal of 721901339359 is 953933109127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 953933109127 = 383 ⋅2490686969.

It is a cyclic number.

It is not a de Polignac number, because 721901339359 - 2¹⁵ = 721901306591 is a prime.

It is a super-2 number, since 2×721901339359² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721901339389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 528477604 + ... + 528478969.

It is an arithmetic number, because the mean of its divisors is an integer number (180739574154).

Almost surely, 2^721901339359 is an apocalyptic number.

721901339359 is a deficient number, since it is larger than the sum of its proper divisors (1056957257).

721901339359 is a wasteful number, since it uses less digits than its factorization.

721901339359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056957256.

The product of its (nonzero) digits is 1377810, while the sum is 52.

The spelling of 721901339359 in words is "seven hundred twenty-one billion, nine hundred one million, three hundred thirty-nine thousand, three hundred fifty-nine".