161062621 has 2 divisors, whose sum is σ = 161062622. Its totient is φ = 161062620.

The previous prime is 161062547. The next prime is 161062633. The reversal of 161062621 is 126260161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149084100 + 11978521 = 12210^2 + 3461^2 .

It is a cyclic number.

It is not a de Polignac number, because 161062621 - 2¹⁵ = 161029853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161062661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80531310 + 80531311.

It is an arithmetic number, because the mean of its divisors is an integer number (80531311).

Almost surely, 2^161062621 is an apocalyptic number.

It is an amenable number.

161062621 is a deficient number, since it is larger than the sum of its proper divisors (1).

161062621 is an equidigital number, since it uses as much as digits as its factorization.

161062621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 161062621 is about 12691.0449136389. The cubic root of 161062621 is about 544.0827046349.

The spelling of 161062621 in words is "one hundred sixty-one million, sixty-two thousand, six hundred twenty-one".