161764319 has 2 divisors, whose sum is σ = 161764320. Its totient is φ = 161764318.

The previous prime is 161764307. The next prime is 161764387. The reversal of 161764319 is 913467161.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161764319 - 2¹⁶ = 161698783 is a prime.

It is a super-2 number, since 2×161764319² = 52335389803067522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161764919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80882159 + 80882160.

It is an arithmetic number, because the mean of its divisors is an integer number (80882160).

Almost surely, 2^161764319 is an apocalyptic number.

161764319 is a deficient number, since it is larger than the sum of its proper divisors (1).

161764319 is an equidigital number, since it uses as much as digits as its factorization.

161764319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 38.

The square root of 161764319 is about 12718.6602674967. The cubic root of 161764319 is about 544.8716910303.

The spelling of 161764319 in words is "one hundred sixty-one million, seven hundred sixty-four thousand, three hundred nineteen".