3121328007 has 16 divisors (see below), whose sum is σ = 5284788480. Its totient is φ = 1783615896.

The previous prime is 3121328003. The next prime is 3121328009. The reversal of 3121328007 is 7008231213.

It is not a de Polignac number, because 3121328007 - 2² = 3121328003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121328003) 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, 8257293 + ... + 8257670.

It is an arithmetic number, because the mean of its divisors is an integer number (330299280).

Almost surely, 2^3121328007 is an apocalyptic number.

3121328007 is a deficient number, since it is larger than the sum of its proper divisors (2163460473).

3121328007 is a wasteful number, since it uses less digits than its factorization.

3121328007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16514979 (or 16514973 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 3121328007 is about 55868.8464799480. The cubic root of 3121328007 is about 1461.4360061270.

The spelling of 3121328007 in words is "three billion, one hundred twenty-one million, three hundred twenty-eight thousand, seven".