167421523 has 2 divisors, whose sum is σ = 167421524. Its totient is φ = 167421522.

The previous prime is 167421511. The next prime is 167421571. The reversal of 167421523 is 325124761.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-167421523 is a prime.

It is not a weakly prime, because it can be changed into another prime (167421323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83710761 + 83710762.

It is an arithmetic number, because the mean of its divisors is an integer number (83710762).

Almost surely, 2^167421523 is an apocalyptic number.

167421523 is a deficient number, since it is larger than the sum of its proper divisors (1).

167421523 is an equidigital number, since it uses as much as digits as its factorization.

167421523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 31.

The square root of 167421523 is about 12939.1469193297. The cubic root of 167421523 is about 551.1507838845.

The spelling of 167421523 in words is "one hundred sixty-seven million, four hundred twenty-one thousand, five hundred twenty-three".