3131407 has 4 divisors (see below), whose sum is σ = 3135496. Its totient is φ = 3127320.

The previous prime is 3131377. The next prime is 3131419. The reversal of 3131407 is 7041313.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7041313 = 227 ⋅31019.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3131407 is a prime.

It is a Duffinian number.

3131407 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131437) 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, 513 + ... + 2554.

It is an arithmetic number, because the mean of its divisors is an integer number (783874).

Almost surely, 2^3131407 is an apocalyptic number.

3131407 is a deficient number, since it is larger than the sum of its proper divisors (4089).

3131407 is a wasteful number, since it uses less digits than its factorization.

3131407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4088.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 3131407 is about 1769.5781983286. The cubic root of 3131407 is about 146.3007343401.

It can be divided in two parts, 313 and 1407, that multiplied together give a triangular number (440391 = T₉₃₈).

The spelling of 3131407 in words is "three million, one hundred thirty-one thousand, four hundred seven".