378769931 has 4 divisors (see below), whose sum is σ = 388008264. Its totient is φ = 369531600.

The previous prime is 378769913. The next prime is 378769933. The reversal of 378769931 is 139967873.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 139967873 = 683 ⋅204931.

It is a cyclic number.

It is not a de Polignac number, because 378769931 - 2²⁶ = 311661067 is a prime.

It is a super-2 number, since 2×378769931² = 286933321259489522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378769933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4619105 + ... + 4619186.

It is an arithmetic number, because the mean of its divisors is an integer number (97002066).

Almost surely, 2^378769931 is an apocalyptic number.

378769931 is a deficient number, since it is larger than the sum of its proper divisors (9238333).

378769931 is an equidigital number, since it uses as much as digits as its factorization.

378769931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9238332.

The product of its digits is 1714608, while the sum is 53.

The square root of 378769931 is about 19462.0125115570. The cubic root of 378769931 is about 723.5332572355.

The spelling of 378769931 in words is "three hundred seventy-eight million, seven hundred sixty-nine thousand, nine hundred thirty-one".