3121002987 has 8 divisors (see below), whose sum is σ = 4406121936. Its totient is φ = 1958276352.

The previous prime is 3121002979. The next prime is 3121003007. The reversal of 3121002987 is 7892001213.

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

It is not a de Polignac number, because 3121002987 - 2³ = 3121002979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3121002977) 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, 30598018 + ... + 30598119.

It is an arithmetic number, because the mean of its divisors is an integer number (550765242).

Almost surely, 2^3121002987 is an apocalyptic number.

3121002987 is a deficient number, since it is larger than the sum of its proper divisors (1285118949).

3121002987 is a wasteful number, since it uses less digits than its factorization.

3121002987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61196157.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 3121002987 is about 55865.9376275025. The cubic root of 3121002987 is about 1461.3852785289.

The spelling of 3121002987 in words is "three billion, one hundred twenty-one million, two thousand, nine hundred eighty-seven".