167998553 has 2 divisors, whose sum is σ = 167998554. Its totient is φ = 167998552.

The previous prime is 167998541. The next prime is 167998603. The reversal of 167998553 is 355899761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152967424 + 15031129 = 12368^2 + 3877^2 .

It is a cyclic number.

It is not a de Polignac number, because 167998553 - 2⁶ = 167998489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 167998495 and 167998504.

It is not a weakly prime, because it can be changed into another prime (167992553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83999276 + 83999277.

It is an arithmetic number, because the mean of its divisors is an integer number (83999277).

Almost surely, 2^167998553 is an apocalyptic number.

It is an amenable number.

167998553 is a deficient number, since it is larger than the sum of its proper divisors (1).

167998553 is an equidigital number, since it uses as much as digits as its factorization.

167998553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2041200, while the sum is 53.

The square root of 167998553 is about 12961.4255774587. The cubic root of 167998553 is about 551.7832510799.

It can be divided in two parts, 16799 and 8553, that added together give a palindrome (25352).

The spelling of 167998553 in words is "one hundred sixty-seven million, nine hundred ninety-eight thousand, five hundred fifty-three".