7792201621 has 2 divisors, whose sum is σ = 7792201622. Its totient is φ = 7792201620.

The previous prime is 7792201607. The next prime is 7792201657. The reversal of 7792201621 is 1261022977.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4262653521 + 3529548100 = 65289^2 + 59410^2 .

It is a cyclic number.

It is not a de Polignac number, because 7792201621 - 2⁵ = 7792201589 is a prime.

It is a super-2 number, since 2×7792201621² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7792201691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3896100810 + 3896100811.

It is an arithmetic number, because the mean of its divisors is an integer number (3896100811).

Almost surely, 2^7792201621 is an apocalyptic number.

It is an amenable number.

7792201621 is a deficient number, since it is larger than the sum of its proper divisors (1).

7792201621 is an equidigital number, since it uses as much as digits as its factorization.

7792201621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 7792201621 is about 88273.4479954193. The cubic root of 7792201621 is about 1982.5313355170.

The spelling of 7792201621 in words is "seven billion, seven hundred ninety-two million, two hundred one thousand, six hundred twenty-one".