674691345 has 48 divisors (see below), whose sum is σ = 1211438592. Its totient is φ = 347141760.

The previous prime is 674691341. The next prime is 674691377. The reversal of 674691345 is 543196476.

It is not a de Polignac number, because 674691345 - 2² = 674691341 is a prime.

It is a super-2 number, since 2×674691345² = 910416822035818050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 674691345.

It is not an unprimeable number, because it can be changed into a prime (674691341) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 147919 + ... + 152411.

It is an arithmetic number, because the mean of its divisors is an integer number (25238304).

Almost surely, 2^674691345 is an apocalyptic number.

It is an amenable number.

674691345 is a deficient number, since it is larger than the sum of its proper divisors (536747247).

674691345 is a wasteful number, since it uses less digits than its factorization.

674691345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4622 (or 4619 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 674691345 is about 25974.8213660845. The cubic root of 674691345 is about 877.0715954945.

The spelling of 674691345 in words is "six hundred seventy-four million, six hundred ninety-one thousand, three hundred forty-five".