161442499 has 2 divisors, whose sum is σ = 161442500. Its totient is φ = 161442498.

The previous prime is 161442439. The next prime is 161442503. The reversal of 161442499 is 994244161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161442499 - 2⁷ = 161442371 is a prime.

It is not a weakly prime, because it can be changed into another prime (161442409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80721249 + 80721250.

It is an arithmetic number, because the mean of its divisors is an integer number (80721250).

Almost surely, 2^161442499 is an apocalyptic number.

161442499 is a deficient number, since it is larger than the sum of its proper divisors (1).

161442499 is an equidigital number, since it uses as much as digits as its factorization.

161442499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 40.

The square root of 161442499 is about 12706.0024791435. The cubic root of 161442499 is about 544.5101217621.

The spelling of 161442499 in words is "one hundred sixty-one million, four hundred forty-two thousand, four hundred ninety-nine".