374447921 has 2 divisors, whose sum is σ = 374447922. Its totient is φ = 374447920.

The previous prime is 374447917. The next prime is 374447923. The reversal of 374447921 is 129744473.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 318122896 + 56325025 = 17836^2 + 7505^2 .

It is an emirp because it is prime and its reverse (129744473) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 374447921 - 2² = 374447917 is a prime.

It is a super-2 number, since 2×374447921² = 280422491082444482, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 374447923, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (374447923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 187223960 + 187223961.

It is an arithmetic number, because the mean of its divisors is an integer number (187223961).

Almost surely, 2^374447921 is an apocalyptic number.

It is an amenable number.

374447921 is a deficient number, since it is larger than the sum of its proper divisors (1).

374447921 is an equidigital number, since it uses as much as digits as its factorization.

374447921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 41.

The square root of 374447921 is about 19350.6568622360. The cubic root of 374447921 is about 720.7707288147.

The spelling of 374447921 in words is "three hundred seventy-four million, four hundred forty-seven thousand, nine hundred twenty-one".