167902993393 has 2 divisors, whose sum is σ = 167902993394. Its totient is φ = 167902993392.

The previous prime is 167902993367. The next prime is 167902993421. The reversal of 167902993393 is 393399209761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129421501504 + 38481491889 = 359752^2 + 196167^2 .

It is an emirp because it is prime and its reverse (393399209761) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-167902993393 is a prime.

It is not a weakly prime, because it can be changed into another prime (167902993333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83951496696 + 83951496697.

It is an arithmetic number, because the mean of its divisors is an integer number (83951496697).

Almost surely, 2^167902993393 is an apocalyptic number.

It is an amenable number.

167902993393 is a deficient number, since it is larger than the sum of its proper divisors (1).

167902993393 is an equidigital number, since it uses as much as digits as its factorization.

167902993393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14880348, while the sum is 61.

The spelling of 167902993393 in words is "one hundred sixty-seven billion, nine hundred two million, nine hundred ninety-three thousand, three hundred ninety-three".