167961553 has 2 divisors, whose sum is σ = 167961554. Its totient is φ = 167961552.

The previous prime is 167961523. The next prime is 167961559. The reversal of 167961553 is 355169761.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164147344 + 3814209 = 12812^2 + 1953^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-167961553 is a prime.

It is a super-2 number, since 2×167961553² = 56422166572343618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (167961559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83980776 + 83980777.

It is an arithmetic number, because the mean of its divisors is an integer number (83980777).

Almost surely, 2^167961553 is an apocalyptic number.

It is an amenable number.

167961553 is a deficient number, since it is larger than the sum of its proper divisors (1).

167961553 is an equidigital number, since it uses as much as digits as its factorization.

167961553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 170100, while the sum is 43.

The square root of 167961553 is about 12959.9981867283. The cubic root of 167961553 is about 551.7427398594.

The spelling of 167961553 in words is "one hundred sixty-seven million, nine hundred sixty-one thousand, five hundred fifty-three".