161674903 has 4 divisors (see below), whose sum is σ = 174111448. Its totient is φ = 149238360.

The previous prime is 161674861. The next prime is 161674907. The reversal of 161674903 is 309476161.

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

It is a cyclic number.

It is not a de Polignac number, because 161674903 - 2¹³ = 161666711 is a prime.

It is a super-2 number, since 2×161674903² = 52277548520118818, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161674907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6218253 + ... + 6218278.

It is an arithmetic number, because the mean of its divisors is an integer number (43527862).

Almost surely, 2^161674903 is an apocalyptic number.

161674903 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

161674903 is a deficient number, since it is larger than the sum of its proper divisors (12436545).

161674903 is a wasteful number, since it uses less digits than its factorization.

161674903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12436544.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 161674903 is about 12715.1446315014. The cubic root of 161674903 is about 544.7712790503.

The spelling of 161674903 in words is "one hundred sixty-one million, six hundred seventy-four thousand, nine hundred three".