378920831 has 2 divisors, whose sum is σ = 378920832. Its totient is φ = 378920830.

The previous prime is 378920821. The next prime is 378920849. The reversal of 378920831 is 138029873.

It is a weak prime.

It is an emirp because it is prime and its reverse (138029873) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 378920831 - 2¹⁴ = 378904447 is a prime.

It is a super-2 number, since 2×378920831² = 287161992331461122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378920821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189460415 + 189460416.

It is an arithmetic number, because the mean of its divisors is an integer number (189460416).

Almost surely, 2^378920831 is an apocalyptic number.

378920831 is a deficient number, since it is larger than the sum of its proper divisors (1).

378920831 is an equidigital number, since it uses as much as digits as its factorization.

378920831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 378920831 is about 19465.8889085497. Note that the first 3 decimals coincide. The cubic root of 378920831 is about 723.6293284595.

The spelling of 378920831 in words is "three hundred seventy-eight million, nine hundred twenty thousand, eight hundred thirty-one".