161362969 has 2 divisors, whose sum is σ = 161362970. Its totient is φ = 161362968.

The previous prime is 161362933. The next prime is 161362987. The reversal of 161362969 is 969263161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104284944 + 57078025 = 10212^2 + 7555^2 .

It is a cyclic number.

It is not a de Polignac number, because 161362969 - 2¹⁵ = 161330201 is a prime.

It is a super-2 number, since 2×161362969² = 52076015528989922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161362909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80681484 + 80681485.

It is an arithmetic number, because the mean of its divisors is an integer number (80681485).

Almost surely, 2^161362969 is an apocalyptic number.

It is an amenable number.

161362969 is a deficient number, since it is larger than the sum of its proper divisors (1).

161362969 is an equidigital number, since it uses as much as digits as its factorization.

161362969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 43.

The square root of 161362969 is about 12702.8724704297. The cubic root of 161362969 is about 544.4206946633.

The spelling of 161362969 in words is "one hundred sixty-one million, three hundred sixty-two thousand, nine hundred sixty-nine".