161003639 has 2 divisors, whose sum is σ = 161003640. Its totient is φ = 161003638.

The previous prime is 161003593. The next prime is 161003669. The reversal of 161003639 is 936300161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161003639 - 2⁸ = 161003383 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161003669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80501819 + 80501820.

It is an arithmetic number, because the mean of its divisors is an integer number (80501820).

Almost surely, 2^161003639 is an apocalyptic number.

161003639 is a deficient number, since it is larger than the sum of its proper divisors (1).

161003639 is an equidigital number, since it uses as much as digits as its factorization.

161003639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 161003639 is about 12688.7209363277. The cubic root of 161003639 is about 544.0162811862.

The spelling of 161003639 in words is "one hundred sixty-one million, three thousand, six hundred thirty-nine".