161461903 has 8 divisors (see below), whose sum is σ = 174186288. Its totient is φ = 149096064.

The previous prime is 161461897. The next prime is 161461939. The reversal of 161461903 is 309164161.

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

It is a cyclic number.

It is not a de Polignac number, because 161461903 - 2⁵ = 161461871 is a prime.

It is a super-2 number, since 2×161461903² = 52139892240762818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161461103) 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, 88701 + ... + 90502.

It is an arithmetic number, because the mean of its divisors is an integer number (21773286).

Almost surely, 2^161461903 is an apocalyptic number.

161461903 is a deficient number, since it is larger than the sum of its proper divisors (12724385).

161461903 is a wasteful number, since it uses less digits than its factorization.

161461903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179273.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 161461903 is about 12706.7660323152. The cubic root of 161461903 is about 544.5319360328.

The spelling of 161461903 in words is "one hundred sixty-one million, four hundred sixty-one thousand, nine hundred three".