378632731 has 2 divisors, whose sum is σ = 378632732. Its totient is φ = 378632730.

The previous prime is 378632719. The next prime is 378632767. The reversal of 378632731 is 137236873.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 378632731 - 2¹⁹ = 378108443 is a prime.

It is a super-2 number, since 2×378632731² = 286725489969036722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (378632431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189316365 + 189316366.

It is an arithmetic number, because the mean of its divisors is an integer number (189316366).

Almost surely, 2^378632731 is an apocalyptic number.

378632731 is a deficient number, since it is larger than the sum of its proper divisors (1).

378632731 is an equidigital number, since it uses as much as digits as its factorization.

378632731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 40.

The square root of 378632731 is about 19458.4873769777. The cubic root of 378632731 is about 723.4458860346.

The spelling of 378632731 in words is "three hundred seventy-eight million, six hundred thirty-two thousand, seven hundred thirty-one".