1298797497 has 30 divisors (see below), whose sum is σ = 2047714218. Its totient is φ = 820274688.

The previous prime is 1298797463. The next prime is 1298797541. The reversal of 1298797497 is 7947978921.

It can be written as a sum of positive squares in only one way, i.e., 757955961 + 540841536 = 27531^2 + 23256^2 .

It is not a de Polignac number, because 1298797497 - 2⁷ = 1298797369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1298797417) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 7033 + ... + 51449.

Almost surely, 2^1298797497 is an apocalyptic number.

It is an amenable number.

1298797497 is a deficient number, since it is larger than the sum of its proper divisors (748916721).

1298797497 is an equidigital number, since it uses as much as digits as its factorization.

1298797497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44467 (or 44439 counting only the distinct ones).

The product of its digits is 16003008, while the sum is 63.

The square root of 1298797497 is about 36038.8331803348. The cubic root of 1298797497 is about 1091.0562656040.

The spelling of 1298797497 in words is "one billion, two hundred ninety-eight million, seven hundred ninety-seven thousand, four hundred ninety-seven".