161212619 has 2 divisors, whose sum is σ = 161212620. Its totient is φ = 161212618.

The previous prime is 161212607. The next prime is 161212627. The reversal of 161212619 is 916212161.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161212619 is a prime.

It is a super-2 number, since 2×161212619² = 51979017049678322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 161212591 and 161212600.

It is not a weakly prime, because it can be changed into another prime (161212699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80606309 + 80606310.

It is an arithmetic number, because the mean of its divisors is an integer number (80606310).

Almost surely, 2^161212619 is an apocalyptic number.

161212619 is a deficient number, since it is larger than the sum of its proper divisors (1).

161212619 is an equidigital number, since it uses as much as digits as its factorization.

161212619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 29.

The square root of 161212619 is about 12696.9531384502. The cubic root of 161212619 is about 544.2515540658.

The spelling of 161212619 in words is "one hundred sixty-one million, two hundred twelve thousand, six hundred nineteen".