145979440391 has 2 divisors, whose sum is σ = 145979440392. Its totient is φ = 145979440390.

The previous prime is 145979440367. The next prime is 145979440429. The reversal of 145979440391 is 193044979541.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145979440391 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145979440891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72989720195 + 72989720196.

It is an arithmetic number, because the mean of its divisors is an integer number (72989720196).

Almost surely, 2^145979440391 is an apocalyptic number.

145979440391 is a deficient number, since it is larger than the sum of its proper divisors (1).

145979440391 is an equidigital number, since it uses as much as digits as its factorization.

145979440391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 145979440391 in words is "one hundred forty-five billion, nine hundred seventy-nine million, four hundred forty thousand, three hundred ninety-one".