7373021621 has 6 divisors (see below), whose sum is σ = 8576780310. Its totient is φ = 6319732776.

The previous prime is 7373021609. The next prime is 7373021639. The reversal of 7373021621 is 1261203737.

It can be written as a sum of positive squares in only one way, i.e., 4707880996 + 2665140625 = 68614^2 + 51625^2 .

It is not a de Polignac number, because 7373021621 - 2¹⁰ = 7373020597 is a prime.

It is a super-2 number, since 2×7373021621² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7373021641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 75234866 + ... + 75234963.

It is an arithmetic number, because the mean of its divisors is an integer number (1429463385).

Almost surely, 2^7373021621 is an apocalyptic number.

It is an amenable number.

7373021621 is a deficient number, since it is larger than the sum of its proper divisors (1203758689).

7373021621 is a wasteful number, since it uses less digits than its factorization.

7373021621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150469843 (or 150469836 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 7373021621 is about 85866.3008461410. The cubic root of 7373021621 is about 1946.3241398882.

The spelling of 7373021621 in words is "seven billion, three hundred seventy-three million, twenty-one thousand, six hundred twenty-one".