122978496247489 has 7 divisors (see below), whose sum is σ = 123532453437793. Its totient is φ = 122427023170146.

The previous prime is 122978496247483. The next prime is 122978496247511. The reversal of 122978496247489 is 984742694879221.

It is a happy number.

The square root of 122978496247489 is 11089567.

The cubic root of 122978496247489 is 49729.

It is a perfect power (a square, a cube, a 6-th power), and thus also a powerful number.

It is not a de Polignac number, because 122978496247489 - 2²⁹ = 122977959376577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122978496247483) by changing a digit.

It is a polite number, since it can be written in 6 ways as a sum of consecutive naturals, for example, 551473077232 + ... + 551473077454.

Almost surely, 2^{122978496247489} is an apocalyptic number.

122978496247489 is the 11089567-th square number.

122978496247489 is the 5544784-th centered octagonal number.

It is an amenable number.

122978496247489 is a deficient number, since it is larger than the sum of its proper divisors (553957190304).

122978496247489 is an frugal number, since it uses more digits than its factorization.

122978496247489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338 (or 223 counting only the distinct ones).

The product of its digits is 7023034368, while the sum is 82.

The spelling of 122978496247489 in words is "one hundred twenty-two trillion, nine hundred seventy-eight billion, four hundred ninety-six million, two hundred forty-seven thousand, four hundred eighty-nine".