146231431993 has 2 divisors, whose sum is σ = 146231431994. Its totient is φ = 146231431992.

The previous prime is 146231431891. The next prime is 146231432041. The reversal of 146231431993 is 399134132641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139941831744 + 6289600249 = 374088^2 + 79307^2 .

It is a cyclic number.

It is not a de Polignac number, because 146231431993 - 2²⁵ = 146197877561 is a prime.

It is not a weakly prime, because it can be changed into another prime (146231435993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73115715996 + 73115715997.

It is an arithmetic number, because the mean of its divisors is an integer number (73115715997).

Almost surely, 2^146231431993 is an apocalyptic number.

It is an amenable number.

146231431993 is a deficient number, since it is larger than the sum of its proper divisors (1).

146231431993 is an equidigital number, since it uses as much as digits as its factorization.

146231431993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 46.

The spelling of 146231431993 in words is "one hundred forty-six billion, two hundred thirty-one million, four hundred thirty-one thousand, nine hundred ninety-three".