161601914 has 4 divisors (see below), whose sum is σ = 242402874. Its totient is φ = 80800956.

The previous prime is 161601911. The next prime is 161601943. The reversal of 161601914 is 419106161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 123988225 + 37613689 = 11135^2 + 6133^2 .

It is a super-2 number, since 2×161601914² = 52230357216926792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161601911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40400477 + ... + 40400480.

Almost surely, 2^161601914 is an apocalyptic number.

161601914 is a deficient number, since it is larger than the sum of its proper divisors (80800960).

161601914 is an equidigital number, since it uses as much as digits as its factorization.

161601914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80800959.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 161601914 is about 12712.2741474529. The cubic root of 161601914 is about 544.6892867409.

The spelling of 161601914 in words is "one hundred sixty-one million, six hundred one thousand, nine hundred fourteen".