670000891 has 16 divisors (see below), whose sum is σ = 793094400. Its totient is φ = 553801248.

The previous prime is 670000883. The next prime is 670000897. The reversal of 670000891 is 198000076.

It is not a de Polignac number, because 670000891 - 2³ = 670000883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (670000897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226500 + ... + 229438.

It is an arithmetic number, because the mean of its divisors is an integer number (49568400).

Almost surely, 2^670000891 is an apocalyptic number.

670000891 is a deficient number, since it is larger than the sum of its proper divisors (123093509).

670000891 is a wasteful number, since it uses less digits than its factorization.

670000891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4098.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 670000891 is about 25884.3754222504. The cubic root of 670000891 is about 875.0344001714.

The spelling of 670000891 in words is "six hundred seventy million, eight hundred ninety-one", and thus it is an aban number.