670401087 has 4 divisors (see below), whose sum is σ = 893868120. Its totient is φ = 446934056.

The previous prime is 670401077. The next prime is 670401107. The reversal of 670401087 is 780104076.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 670401087 - 2²⁸ = 401965631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670401077) 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, 111733512 + ... + 111733517.

It is an arithmetic number, because the mean of its divisors is an integer number (223467030).

Almost surely, 2^670401087 is an apocalyptic number.

670401087 is a deficient number, since it is larger than the sum of its proper divisors (223467033).

670401087 is a wasteful number, since it uses less digits than its factorization.

670401087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223467032.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 670401087 is about 25892.1047232549. The cubic root of 670401087 is about 875.2085867891.

The spelling of 670401087 in words is "six hundred seventy million, four hundred one thousand, eighty-seven".