31486723 has 2 divisors, whose sum is σ = 31486724. Its totient is φ = 31486722.

The previous prime is 31486711. The next prime is 31486727. The reversal of 31486723 is 32768413.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31486723 is a prime.

It is a zygodrome in base 2.

It is not a weakly prime, because it can be changed into another prime (31486727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15743361 + 15743362.

It is an arithmetic number, because the mean of its divisors is an integer number (15743362).

Almost surely, 2^31486723 is an apocalyptic number.

31486723 is a deficient number, since it is larger than the sum of its proper divisors (1).

31486723 is an equidigital number, since it uses as much as digits as its factorization.

31486723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 34.

The square root of 31486723 is about 5611.3031463288. The cubic root of 31486723 is about 315.7736020566.

It can be divided in two parts, 31486 and 723, that multiplied together give a triangular number (22764378 = T₆₇₄₇).

The spelling of 31486723 in words is "thirty-one million, four hundred eighty-six thousand, seven hundred twenty-three".