31493743 has 2 divisors, whose sum is σ = 31493744. Its totient is φ = 31493742.

The previous prime is 31493717. The next prime is 31493779. The reversal of 31493743 is 34739413.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31493743 - 2⁵ = 31493711 is a prime.

It is equal to p_1944466 and since 31493743 and 1944466 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 31493699 and 31493708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31493783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15746871 + 15746872.

It is an arithmetic number, because the mean of its divisors is an integer number (15746872).

Almost surely, 2^31493743 is an apocalyptic number.

31493743 is a deficient number, since it is larger than the sum of its proper divisors (1).

31493743 is an equidigital number, since it uses as much as digits as its factorization.

31493743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 34.

The square root of 31493743 is about 5611.9286346140. The cubic root of 31493743 is about 315.7970676717.

The spelling of 31493743 in words is "thirty-one million, four hundred ninety-three thousand, seven hundred forty-three".