145935931 has 4 divisors (see below), whose sum is σ = 146050264. Its totient is φ = 145821600.

The previous prime is 145935929. The next prime is 145935967. The reversal of 145935931 is 139539541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 139539541 = 4243 ⋅32887.

It is a cyclic number.

It is not a de Polignac number, because 145935931 - 2¹ = 145935929 is a prime.

It is a super-2 number, since 2×145935931² = 42594591913673522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145935901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55230 + ... + 57811.

It is an arithmetic number, because the mean of its divisors is an integer number (36512566).

Almost surely, 2^145935931 is an apocalyptic number.

145935931 is a deficient number, since it is larger than the sum of its proper divisors (114333).

145935931 is a wasteful number, since it uses less digits than its factorization.

145935931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114332.

The product of its digits is 72900, while the sum is 40.

The square root of 145935931 is about 12080.3944885918. The cubic root of 145935931 is about 526.4867077750.

The spelling of 145935931 in words is "one hundred forty-five million, nine hundred thirty-five thousand, nine hundred thirty-one".