674194207 has 4 divisors (see below), whose sum is σ = 674259120. Its totient is φ = 674129296.

The previous prime is 674194181. The next prime is 674194217. The reversal of 674194207 is 702491476.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a 4-Lehmer number, since φ(674194207) divides (674194207-1)⁴.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-674194207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 674194207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (674194217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12982 + ... + 38947.

It is an arithmetic number, because the mean of its divisors is an integer number (168564780).

Almost surely, 2^674194207 is an apocalyptic number.

674194207 is the 12983-rd decagonal number.

674194207 is a deficient number, since it is larger than the sum of its proper divisors (64913).

674194207 is a wasteful number, since it uses less digits than its factorization.

674194207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64912.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 674194207 is about 25965.2499891682. The cubic root of 674194207 is about 876.8561227655.

The spelling of 674194207 in words is "six hundred seventy-four million, one hundred ninety-four thousand, two hundred seven".