671293387 has 8 divisors (see below), whose sum is σ = 705830400. Its totient is φ = 637202280.

The previous prime is 671293373. The next prime is 671293409. The reversal of 671293387 is 783392176.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671293387 is a prime.

It is a super-2 number, since 2×671293387² = 901269622859863538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671293187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108387 + ... + 114412.

It is an arithmetic number, because the mean of its divisors is an integer number (88228800).

Almost surely, 2^671293387 is an apocalyptic number.

671293387 is a deficient number, since it is larger than the sum of its proper divisors (34537013).

671293387 is a wasteful number, since it uses less digits than its factorization.

671293387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222953.

The product of its digits is 381024, while the sum is 46.

The square root of 671293387 is about 25909.3301148447. The cubic root of 671293387 is about 875.5967138441.

The spelling of 671293387 in words is "six hundred seventy-one million, two hundred ninety-three thousand, three hundred eighty-seven".