19593423397 has 2 divisors, whose sum is σ = 19593423398. Its totient is φ = 19593423396.

The previous prime is 19593423347. The next prime is 19593423503. The reversal of 19593423397 is 79332439591.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17586472996 + 2006950401 = 132614^2 + 44799^2 .

It is a cyclic number.

It is not a de Polignac number, because 19593423397 - 2²³ = 19585034789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19593423347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9796711698 + 9796711699.

It is an arithmetic number, because the mean of its divisors is an integer number (9796711699).

Almost surely, 2^19593423397 is an apocalyptic number.

It is an amenable number.

19593423397 is a deficient number, since it is larger than the sum of its proper divisors (1).

19593423397 is an equidigital number, since it uses as much as digits as its factorization.

19593423397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5511240, while the sum is 55.

The spelling of 19593423397 in words is "nineteen billion, five hundred ninety-three million, four hundred twenty-three thousand, three hundred ninety-seven".