379817881 has 2 divisors, whose sum is σ = 379817882. Its totient is φ = 379817880.

The previous prime is 379817861. The next prime is 379817887. The reversal of 379817881 is 188718973.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 361190025 + 18627856 = 19005^2 + 4316^2 .

It is a cyclic number.

It is not a de Polignac number, because 379817881 - 2⁵ = 379817849 is a prime.

It is a super-2 number, since 2×379817881² = 288523245454660322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (379817887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189908940 + 189908941.

It is an arithmetic number, because the mean of its divisors is an integer number (189908941).

Almost surely, 2^379817881 is an apocalyptic number.

It is an amenable number.

379817881 is a deficient number, since it is larger than the sum of its proper divisors (1).

379817881 is an equidigital number, since it uses as much as digits as its factorization.

379817881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 52.

The square root of 379817881 is about 19488.9168760093. The cubic root of 379817881 is about 724.1999138882.

The spelling of 379817881 in words is "three hundred seventy-nine million, eight hundred seventeen thousand, eight hundred eighty-one".