161276513 has 2 divisors, whose sum is σ = 161276514. Its totient is φ = 161276512.

The previous prime is 161276461. The next prime is 161276519. The reversal of 161276513 is 315672161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160073104 + 1203409 = 12652^2 + 1097^2 .

It is a cyclic number.

It is not a de Polignac number, because 161276513 - 2²² = 157082209 is a prime.

It is a super-2 number, since 2×161276513² = 52020227290878338, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161276513.

It is not a weakly prime, because it can be changed into another prime (161276519) 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, 80638256 + 80638257.

It is an arithmetic number, because the mean of its divisors is an integer number (80638257).

Almost surely, 2^161276513 is an apocalyptic number.

It is an amenable number.

161276513 is a deficient number, since it is larger than the sum of its proper divisors (1).

161276513 is an equidigital number, since it uses as much as digits as its factorization.

161276513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 32.

The square root of 161276513 is about 12699.4690046474. The cubic root of 161276513 is about 544.3234463199.

It can be divided in two parts, 1612 and 76513, that added together give a 7-th power (78125 = 5⁷).

The spelling of 161276513 in words is "one hundred sixty-one million, two hundred seventy-six thousand, five hundred thirteen".