31954123 has 2 divisors, whose sum is σ = 31954124. Its totient is φ = 31954122.

The previous prime is 31954103. The next prime is 31954127. The reversal of 31954123 is 32145913.

It is a strong prime.

It is an emirp because it is prime and its reverse (32145913) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31954123 - 2²¹ = 29856971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31954091 and 31954100.

It is not a weakly prime, because it can be changed into another prime (31954127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15977061 + 15977062.

It is an arithmetic number, because the mean of its divisors is an integer number (15977062).

Almost surely, 2^31954123 is an apocalyptic number.

31954123 is a deficient number, since it is larger than the sum of its proper divisors (1).

31954123 is an equidigital number, since it uses as much as digits as its factorization.

31954123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 28.

The square root of 31954123 is about 5652.7978028583. The cubic root of 31954123 is about 317.3284186688.

The spelling of 31954123 in words is "thirty-one million, nine hundred fifty-four thousand, one hundred twenty-three".