161701407 has 32 divisors (see below), whose sum is σ = 275059200. Its totient is φ = 91969344.

The previous prime is 161701403. The next prime is 161701409. The reversal of 161701407 is 704107161.

161701407 is a `hidden beast` number, since 1 + 617 + 0 + 1 + 40 + 7 = 666.

It is not a de Polignac number, because 161701407 - 2² = 161701403 is a prime.

It is a super-2 number, since 2×161701407² = 52294690051559298, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161701403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41019 + ... + 44787.

It is an arithmetic number, because the mean of its divisors is an integer number (8595600).

Almost surely, 2^161701407 is an apocalyptic number.

161701407 is a deficient number, since it is larger than the sum of its proper divisors (113357793).

161701407 is a wasteful number, since it uses less digits than its factorization.

161701407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4012 (or 4006 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 161701407 is about 12716.1868105183. The cubic root of 161701407 is about 544.8010462535.

Adding to 161701407 its reverse (704107161), we get a palindrome (865808568).

The spelling of 161701407 in words is "one hundred sixty-one million, seven hundred one thousand, four hundred seven".