162421999 has 2 divisors, whose sum is σ = 162422000. Its totient is φ = 162421998.

The previous prime is 162421993. The next prime is 162422023. The reversal of 162421999 is 999124261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 162421999 - 2⁵ = 162421967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162421993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81210999 + 81211000.

It is an arithmetic number, because the mean of its divisors is an integer number (81211000).

Almost surely, 2^162421999 is an apocalyptic number.

162421999 is a deficient number, since it is larger than the sum of its proper divisors (1).

162421999 is an equidigital number, since it uses as much as digits as its factorization.

162421999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 43.

The square root of 162421999 is about 12744.4889658236. The cubic root of 162421999 is about 545.6091150066.

The spelling of 162421999 in words is "one hundred sixty-two million, four hundred twenty-one thousand, nine hundred ninety-nine".