162891623 has 2 divisors, whose sum is σ = 162891624. Its totient is φ = 162891622.

The previous prime is 162891587. The next prime is 162891653. The reversal of 162891623 is 326198261.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 162891623 - 2²⁰ = 161843047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162891653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81445811 + 81445812.

It is an arithmetic number, because the mean of its divisors is an integer number (81445812).

Almost surely, 2^162891623 is an apocalyptic number.

162891623 is a deficient number, since it is larger than the sum of its proper divisors (1).

162891623 is an equidigital number, since it uses as much as digits as its factorization.

162891623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 38.

The square root of 162891623 is about 12762.9002581702. The cubic root of 162891623 is about 546.1344637453.

The spelling of 162891623 in words is "one hundred sixty-two million, eight hundred ninety-one thousand, six hundred twenty-three".