161386043 has 12 divisors (see below), whose sum is σ = 199721808. Its totient is φ = 127689120.

The previous prime is 161386033. The next prime is 161386061. The reversal of 161386043 is 340683161.

It is not a de Polignac number, because 161386043 - 2¹⁰ = 161385019 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (161386013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67028 + ... + 69393.

It is an arithmetic number, because the mean of its divisors is an integer number (16643484).

Almost surely, 2^161386043 is an apocalyptic number.

161386043 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

161386043 is a deficient number, since it is larger than the sum of its proper divisors (38335765).

161386043 is a wasteful number, since it uses less digits than its factorization.

161386043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136454 (or 136441 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 161386043 is about 12703.7806577412. The cubic root of 161386043 is about 544.4466431290.

The spelling of 161386043 in words is "one hundred sixty-one million, three hundred eighty-six thousand, forty-three".