162428989 has 2 divisors, whose sum is σ = 162428990. Its totient is φ = 162428988.

The previous prime is 162428983. The next prime is 162429019. The reversal of 162428989 is 989824261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114126489 + 48302500 = 10683^2 + 6950^2 .

It is an emirp because it is prime and its reverse (989824261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 162428989 - 2¹⁷ = 162297917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162428983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81214494 + 81214495.

It is an arithmetic number, because the mean of its divisors is an integer number (81214495).

Almost surely, 2^162428989 is an apocalyptic number.

It is an amenable number.

162428989 is a deficient number, since it is larger than the sum of its proper divisors (1).

162428989 is an equidigital number, since it uses as much as digits as its factorization.

162428989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 49.

The square root of 162428989 is about 12744.7631990555. The cubic root of 162428989 is about 545.6169418466.

The spelling of 162428989 in words is "one hundred sixty-two million, four hundred twenty-eight thousand, nine hundred eighty-nine".