162780997 has 2 divisors, whose sum is σ = 162780998. Its totient is φ = 162780996.

The previous prime is 162780991. The next prime is 162781007. The reversal of 162780997 is 799087261.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161951076 + 829921 = 12726^2 + 911^2 .

It is a cyclic number.

It is not a de Polignac number, because 162780997 - 2¹¹ = 162778949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 162780997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162780991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81390498 + 81390499.

It is an arithmetic number, because the mean of its divisors is an integer number (81390499).

Almost surely, 2^162780997 is an apocalyptic number.

It is an amenable number.

162780997 is a deficient number, since it is larger than the sum of its proper divisors (1).

162780997 is an equidigital number, since it uses as much as digits as its factorization.

162780997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 49.

The square root of 162780997 is about 12758.5656325466. The cubic root of 162780997 is about 546.0108020691.

The spelling of 162780997 in words is "one hundred sixty-two million, seven hundred eighty thousand, nine hundred ninety-seven".