162971623 has 2 divisors, whose sum is σ = 162971624. Its totient is φ = 162971622.

The previous prime is 162971587. The next prime is 162971657. The reversal of 162971623 is 326179261.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-162971623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162971663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81485811 + 81485812.

It is an arithmetic number, because the mean of its divisors is an integer number (81485812).

Almost surely, 2^162971623 is an apocalyptic number.

162971623 is a deficient number, since it is larger than the sum of its proper divisors (1).

162971623 is an equidigital number, since it uses as much as digits as its factorization.

162971623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 37.

The square root of 162971623 is about 12766.0339573416. The cubic root of 162971623 is about 546.2238557098.

The spelling of 162971623 in words is "one hundred sixty-two million, nine hundred seventy-one thousand, six hundred twenty-three".