162611993 has 2 divisors, whose sum is σ = 162611994. Its totient is φ = 162611992.

The previous prime is 162611947. The next prime is 162612007. The reversal of 162611993 is 399116261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162511504 + 100489 = 12748^2 + 317^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-162611993 is a prime.

It is not a weakly prime, because it can be changed into another prime (162611923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81305996 + 81305997.

It is an arithmetic number, because the mean of its divisors is an integer number (81305997).

Almost surely, 2^162611993 is an apocalyptic number.

It is an amenable number.

162611993 is a deficient number, since it is larger than the sum of its proper divisors (1).

162611993 is an equidigital number, since it uses as much as digits as its factorization.

162611993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 38.

The square root of 162611993 is about 12751.9407542538. The cubic root of 162611993 is about 545.8217751659.

The spelling of 162611993 in words is "one hundred sixty-two million, six hundred eleven thousand, nine hundred ninety-three".