161874733 has 2 divisors, whose sum is σ = 161874734. Its totient is φ = 161874732.

The previous prime is 161874719. The next prime is 161874743. The reversal of 161874733 is 337478161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161874729 + 4 = 12723^2 + 2^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161874733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161874743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80937366 + 80937367.

It is an arithmetic number, because the mean of its divisors is an integer number (80937367).

Almost surely, 2^161874733 is an apocalyptic number.

It is an amenable number.

161874733 is a deficient number, since it is larger than the sum of its proper divisors (1).

161874733 is an equidigital number, since it uses as much as digits as its factorization.

161874733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 40.

The square root of 161874733 is about 12723.0001571956. Note that the first 3 decimals coincide. The cubic root of 161874733 is about 544.9956322070.

The spelling of 161874733 in words is "one hundred sixty-one million, eight hundred seventy-four thousand, seven hundred thirty-three".