144661931 has 2 divisors, whose sum is σ = 144661932. Its totient is φ = 144661930.

The previous prime is 144661883. The next prime is 144661949. The reversal of 144661931 is 139166441.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144661931 is a prime.

It is a super-2 number, since 2×144661931² = 41854148561297522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 144661891 and 144661900.

It is not a weakly prime, because it can be changed into another prime (144661031) 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 as a sum of consecutive naturals, namely, 72330965 + 72330966.

It is an arithmetic number, because the mean of its divisors is an integer number (72330966).

Almost surely, 2^144661931 is an apocalyptic number.

144661931 is a deficient number, since it is larger than the sum of its proper divisors (1).

144661931 is an equidigital number, since it uses as much as digits as its factorization.

144661931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 144661931 is about 12027.5488359017. The cubic root of 144661931 is about 524.9501763753.

The spelling of 144661931 in words is "one hundred forty-four million, six hundred sixty-one thousand, nine hundred thirty-one".