2920378957 has 4 divisors (see below), whose sum is σ = 2999308156. Its totient is φ = 2841449760.

The previous prime is 2920378897. The next prime is 2920379003. The reversal of 2920378957 is 7598730292.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2384271241 + 536107716 = 48829^2 + 23154^2 .

It is a cyclic number.

It is not a de Polignac number, because 2920378957 - 2⁷ = 2920378829 is a prime.

It is a super-2 number, since 2×2920378957² = 17057226504976815698, which 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 (2920378457) 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, 39464544 + ... + 39464617.

It is an arithmetic number, because the mean of its divisors is an integer number (749827039).

Almost surely, 2^2920378957 is an apocalyptic number.

It is an amenable number.

2920378957 is a deficient number, since it is larger than the sum of its proper divisors (78929199).

2920378957 is an equidigital number, since it uses as much as digits as its factorization.

2920378957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78929198.

The product of its (nonzero) digits is 1905120, while the sum is 52.

The square root of 2920378957 is about 54040.5306876237. The cubic root of 2920378957 is about 1429.3757291098.

The spelling of 2920378957 in words is "two billion, nine hundred twenty million, three hundred seventy-eight thousand, nine hundred fifty-seven".