3751313781 has 4 divisors (see below), whose sum is σ = 5001751712. Its totient is φ = 2500875852.

The previous prime is 3751313759. The next prime is 3751313801. The reversal of 3751313781 is 1873131573.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1873131573 = 3 ⋅624377191.

It is not a de Polignac number, because 3751313781 - 2⁶ = 3751313717 is a prime.

It is a super-2 number, since 2×3751313781² = 28144710167041031922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3751313711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 625218961 + ... + 625218966.

It is an arithmetic number, because the mean of its divisors is an integer number (1250437928).

Almost surely, 2^3751313781 is an apocalyptic number.

It is an amenable number.

3751313781 is a deficient number, since it is larger than the sum of its proper divisors (1250437931).

3751313781 is a wasteful number, since it uses less digits than its factorization.

3751313781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250437930.

The product of its digits is 52920, while the sum is 39.

The square root of 3751313781 is about 61247.9696071633. The cubic root of 3751313781 is about 1553.7976639279.

The spelling of 3751313781 in words is "three billion, seven hundred fifty-one million, three hundred thirteen thousand, seven hundred eighty-one".