378407231 has 2 divisors, whose sum is σ = 378407232. Its totient is φ = 378407230.

The previous prime is 378407221. The next prime is 378407243. The reversal of 378407231 is 132704873.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378407231 is a prime.

It is a super-2 number, since 2×378407231² = 286384064946174722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 378407191 and 378407200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378407221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189203615 + 189203616.

It is an arithmetic number, because the mean of its divisors is an integer number (189203616).

Almost surely, 2^378407231 is an apocalyptic number.

378407231 is a deficient number, since it is larger than the sum of its proper divisors (1).

378407231 is an equidigital number, since it uses as much as digits as its factorization.

378407231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 378407231 is about 19452.6921273124. The cubic root of 378407231 is about 723.3022380870.

The spelling of 378407231 in words is "three hundred seventy-eight million, four hundred seven thousand, two hundred thirty-one".