312002989 has 8 divisors (see below), whose sum is σ = 338414328. Its totient is φ = 286487040.

The previous prime is 312002963. The next prime is 312003001. The reversal of 312002989 is 989200213.

It can be written as a sum of positive squares in 4 ways, for example, as 11847364 + 300155625 = 3442^2 + 17325^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 312002989 - 2²¹ = 309905837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312002959) 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, 223122 + ... + 224515.

It is an arithmetic number, because the mean of its divisors is an integer number (42301791).

Almost surely, 2^312002989 is an apocalyptic number.

It is an amenable number.

312002989 is a deficient number, since it is larger than the sum of its proper divisors (26411339).

312002989 is a wasteful number, since it uses less digits than its factorization.

312002989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447695.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 312002989 is about 17663.6063418544. The cubic root of 312002989 is about 678.2444544786.

The spelling of 312002989 in words is "three hundred twelve million, two thousand, nine hundred eighty-nine".