145683931 has 8 divisors (see below), whose sum is σ = 154463760. Its totient is φ = 136927488.

The previous prime is 145683917. The next prime is 145683943. The reversal of 145683931 is 139386541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145683931 - 2⁵ = 145683899 is a prime.

It is a super-2 number, since 2×145683931² = 42447615503225522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145683961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7935 + ... + 18823.

It is an arithmetic number, because the mean of its divisors is an integer number (19307970).

Almost surely, 2^145683931 is an apocalyptic number.

145683931 is a deficient number, since it is larger than the sum of its proper divisors (8779829).

145683931 is a wasteful number, since it uses less digits than its factorization.

145683931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11693.

The product of its digits is 77760, while the sum is 40.

The square root of 145683931 is about 12069.9598590882. The cubic root of 145683931 is about 526.1834900326.

The spelling of 145683931 in words is "one hundred forty-five million, six hundred eighty-three thousand, nine hundred thirty-one".