161087793 has 8 divisors (see below), whose sum is σ = 214924608. Its totient is φ = 107321424.

The previous prime is 161087783. The next prime is 161087819. The reversal of 161087793 is 397780161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161087793 - 2¹⁷ = 160956721 is a prime.

It is a super-2 number, since 2×161087793² = 51898554107221698, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (161087743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12021 + ... + 21602.

It is an arithmetic number, because the mean of its divisors is an integer number (26865576).

Almost surely, 2^161087793 is an apocalyptic number.

It is an amenable number.

161087793 is a deficient number, since it is larger than the sum of its proper divisors (53836815).

161087793 is a wasteful number, since it uses less digits than its factorization.

161087793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35223.

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 161087793 is about 12692.0365978042. The cubic root of 161087793 is about 544.1110475165. Note that the first 3 decimals are identical.

The spelling of 161087793 in words is "one hundred sixty-one million, eighty-seven thousand, seven hundred ninety-three".