161700406 has 8 divisors (see below), whose sum is σ = 277200720. Its totient is φ = 69300168.

The previous prime is 161700389. The next prime is 161700437. The reversal of 161700406 is 604007161.

It is a happy number.

161700406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×161700406² = 52294042601129672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5775001 + ... + 5775028.

It is an arithmetic number, because the mean of its divisors is an integer number (34650090).

Almost surely, 2^161700406 is an apocalyptic number.

161700406 is a deficient number, since it is larger than the sum of its proper divisors (115500314).

161700406 is a wasteful number, since it uses less digits than its factorization.

161700406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11550038.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 161700406 is about 12716.1474511740. The cubic root of 161700406 is about 544.7999220683.

Adding to 161700406 its reverse (604007161), we get a palindrome (765707567).

The spelling of 161700406 in words is "one hundred sixty-one million, seven hundred thousand, four hundred six".