674639519 has 12 divisors (see below), whose sum is σ = 709826376. Its totient is φ = 641118192.

The previous prime is 674639507. The next prime is 674639531. The reversal of 674639519 is 915936476.

It is an interprime number because it is at equal distance from previous prime (674639507) and next prime (674639531).

It is not a de Polignac number, because 674639519 - 2⁴ = 674639503 is a prime.

It is a super-2 number, since 2×674639519² = 910276961193102722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (674630519) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78992 + ... + 87114.

It is an arithmetic number, because the mean of its divisors is an integer number (59152198).

Almost surely, 2^674639519 is an apocalyptic number.

674639519 is a deficient number, since it is larger than the sum of its proper divisors (35186857).

674639519 is a wasteful number, since it uses less digits than its factorization.

674639519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8326 (or 8303 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 50.

The square root of 674639519 is about 25973.8237269756. The cubic root of 674639519 is about 877.0491376814.

The spelling of 674639519 in words is "six hundred seventy-four million, six hundred thirty-nine thousand, five hundred nineteen".