7939220957 has 4 divisors (see below), whose sum is σ = 7941084096. Its totient is φ = 7937357820.

The previous prime is 7939220941. The next prime is 7939220981. The reversal of 7939220957 is 7590229397.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7590229397 = 2447 ⋅3101851.

It is a cyclic number.

It is not a de Polignac number, because 7939220957 - 2⁴ = 7939220941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7939220899 and 7939220908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7939220987) 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, 925163 + ... + 933704.

It is an arithmetic number, because the mean of its divisors is an integer number (1985271024).

Almost surely, 2^7939220957 is an apocalyptic number.

It is an amenable number.

7939220957 is a deficient number, since it is larger than the sum of its proper divisors (1863139).

7939220957 is a wasteful number, since it uses less digits than its factorization.

7939220957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1863138.

The product of its (nonzero) digits is 2143260, while the sum is 53.

The square root of 7939220957 is about 89102.3061261604. The cubic root of 7939220957 is about 1994.9221986271.

The spelling of 7939220957 in words is "seven billion, nine hundred thirty-nine million, two hundred twenty thousand, nine hundred fifty-seven".