31489679623 has 2 divisors, whose sum is σ = 31489679624. Its totient is φ = 31489679622.

The previous prime is 31489679593. The next prime is 31489679653. The reversal of 31489679623 is 32697698413.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (31489679593) and next prime (31489679653).

It is a cyclic number.

It is not a de Polignac number, because 31489679623 - 2¹⁷ = 31489548551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31489679653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15744839811 + 15744839812.

It is an arithmetic number, because the mean of its divisors is an integer number (15744839812).

Almost surely, 2^31489679623 is an apocalyptic number.

31489679623 is a deficient number, since it is larger than the sum of its proper divisors (1).

31489679623 is an equidigital number, since it uses as much as digits as its factorization.

31489679623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 58.

The spelling of 31489679623 in words is "thirty-one billion, four hundred eighty-nine million, six hundred seventy-nine thousand, six hundred twenty-three".