161154073 has 4 divisors (see below), whose sum is σ = 166711140. Its totient is φ = 155597008.

The previous prime is 161154053. The next prime is 161154107. The reversal of 161154073 is 370451161.

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

It can be written as a sum of positive squares in 2 ways, for example, as 45118089 + 116035984 = 6717^2 + 10772^2 .

It is a cyclic number.

It is not a de Polignac number, because 161154073 - 2⁵ = 161154041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161154053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2778490 + ... + 2778547.

It is an arithmetic number, because the mean of its divisors is an integer number (41677785).

Almost surely, 2^161154073 is an apocalyptic number.

It is an amenable number.

161154073 is a deficient number, since it is larger than the sum of its proper divisors (5557067).

161154073 is an equidigital number, since it uses as much as digits as its factorization.

161154073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5557066.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 161154073 is about 12694.6474153479. The cubic root of 161154073 is about 544.1856625955.

The spelling of 161154073 in words is "one hundred sixty-one million, one hundred fifty-four thousand, seventy-three".