674378401 has 2 divisors, whose sum is σ = 674378402. Its totient is φ = 674378400.

The previous prime is 674378387. The next prime is 674378447. The reversal of 674378401 is 104873476.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 600005025 + 74373376 = 24495^2 + 8624^2 .

It is a cyclic number.

It is not a de Polignac number, because 674378401 - 2⁷ = 674378273 is a prime.

It is equal to p_34993723 and since 674378401 and 34993723 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (674378461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337189200 + 337189201.

It is an arithmetic number, because the mean of its divisors is an integer number (337189201).

Almost surely, 2^674378401 is an apocalyptic number.

It is an amenable number.

674378401 is a deficient number, since it is larger than the sum of its proper divisors (1).

674378401 is an equidigital number, since it uses as much as digits as its factorization.

674378401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 674378401 is about 25968.7966798618. The cubic root of 674378401 is about 876.9359696546.

The spelling of 674378401 in words is "six hundred seventy-four million, three hundred seventy-eight thousand, four hundred one".