31423741 has 4 divisors (see below), whose sum is σ = 31503292. Its totient is φ = 31344192.

The previous prime is 31423729. The next prime is 31423747. The reversal of 31423741 is 14732413.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22838841 + 8584900 = 4779^2 + 2930^2 .

It is a cyclic number.

It is not a de Polignac number, because 31423741 - 2⁵ = 31423709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31423747) 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, 39180 + ... + 39973.

It is an arithmetic number, because the mean of its divisors is an integer number (7875823).

Almost surely, 2^31423741 is an apocalyptic number.

It is an amenable number.

31423741 is a deficient number, since it is larger than the sum of its proper divisors (79551).

31423741 is an equidigital number, since it uses as much as digits as its factorization.

31423741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79550.

The product of its digits is 2016, while the sum is 25.

The square root of 31423741 is about 5605.6882717468. The cubic root of 31423741 is about 315.5629171883.

The spelling of 31423741 in words is "thirty-one million, four hundred twenty-three thousand, seven hundred forty-one".