161087499 has 6 divisors (see below), whose sum is σ = 232681956. Its totient is φ = 107391660.

The previous prime is 161087467. The next prime is 161087527. The reversal of 161087499 is 994780161.

It is a happy number.

It is not a de Polignac number, because 161087499 - 2⁵ = 161087467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161087449) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8949297 + ... + 8949314.

It is an arithmetic number, because the mean of its divisors is an integer number (38780326).

Almost surely, 2^161087499 is an apocalyptic number.

161087499 is a deficient number, since it is larger than the sum of its proper divisors (71594457).

161087499 is a wasteful number, since it uses less digits than its factorization.

161087499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17898617 (or 17898614 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 161087499 is about 12692.0250157333. The cubic root of 161087499 is about 544.1107164988.

The spelling of 161087499 in words is "one hundred sixty-one million, eighty-seven thousand, four hundred ninety-nine".