1880920957 has 2 divisors, whose sum is σ = 1880920958. Its totient is φ = 1880920956.

The previous prime is 1880920907. The next prime is 1880920967. The reversal of 1880920957 is 7590290881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1655350596 + 225570361 = 40686^2 + 15019^2 .

It is a cyclic number.

It is not a de Polignac number, because 1880920957 - 2⁷ = 1880920829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1880920957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1880920907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 940460478 + 940460479.

It is an arithmetic number, because the mean of its divisors is an integer number (940460479).

Almost surely, 2^1880920957 is an apocalyptic number.

It is an amenable number.

1880920957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1880920957 is an equidigital number, since it uses as much as digits as its factorization.

1880920957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 49.

The square root of 1880920957 is about 43369.5856217234. The cubic root of 1880920957 is about 1234.4026586695.

The spelling of 1880920957 in words is "one billion, eight hundred eighty million, nine hundred twenty thousand, nine hundred fifty-seven".