31923119 has 16 divisors (see below), whose sum is σ = 34013952. Its totient is φ = 29922048.

The previous prime is 31923109. The next prime is 31923121. The reversal of 31923119 is 91132913.

It is not a de Polignac number, because 31923119 - 2¹² = 31919023 is a prime.

It is a super-2 number, since 2×31923119² = 2038171053376322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31923091 and 31923100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31923109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143042 + ... + 143264.

It is an arithmetic number, because the mean of its divisors is an integer number (2125872).

Almost surely, 2^31923119 is an apocalyptic number.

31923119 is a deficient number, since it is larger than the sum of its proper divisors (2090833).

31923119 is a wasteful number, since it uses less digits than its factorization.

31923119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386.

The product of its digits is 1458, while the sum is 29.

The square root of 31923119 is about 5650.0547784955. The cubic root of 31923119 is about 317.2257544630.

The spelling of 31923119 in words is "thirty-one million, nine hundred twenty-three thousand, one hundred nineteen".