374778643 has 2 divisors, whose sum is σ = 374778644. Its totient is φ = 374778642.

The previous prime is 374778631. The next prime is 374778647. The reversal of 374778643 is 346877473.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-374778643 is a prime.

It is not a weakly prime, because it can be changed into another prime (374778647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 187389321 + 187389322.

It is an arithmetic number, because the mean of its divisors is an integer number (187389322).

Almost surely, 2^374778643 is an apocalyptic number.

374778643 is a deficient number, since it is larger than the sum of its proper divisors (1).

374778643 is an equidigital number, since it uses as much as digits as its factorization.

374778643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2370816, while the sum is 49.

The square root of 374778643 is about 19359.2004741931. The cubic root of 374778643 is about 720.9828674313.

The spelling of 374778643 in words is "three hundred seventy-four million, seven hundred seventy-eight thousand, six hundred forty-three".