1497015021797 has 4 divisors (see below), whose sum is σ = 1525260588300. Its totient is φ = 1468769455296.

The previous prime is 1497015021793. The next prime is 1497015021847. The reversal of 1497015021797 is 7971205107941.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1242420100321 + 254594921476 = 1114639^2 + 504574^2 .

It is not a de Polignac number, because 1497015021797 - 2² = 1497015021793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53), and also a Moran number because the ratio is a prime number: 28245566449 = 1497015021797 / (1 + 4 + 9 + 7 + 0 + 1 + 5 + 0 + 2 + 1 + 7 + 9 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1497015021793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14122783172 + ... + 14122783277.

It is an arithmetic number, because the mean of its divisors is an integer number (381315147075).

Almost surely, 2^{1497015021797} is an apocalyptic number.

It is an amenable number.

1497015021797 is a deficient number, since it is larger than the sum of its proper divisors (28245566503).

1497015021797 is an equidigital number, since it uses as much as digits as its factorization.

1497015021797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28245566502.

The product of its (nonzero) digits is 1111320, while the sum is 53.

The spelling of 1497015021797 in words is "one trillion, four hundred ninety-seven billion, fifteen million, twenty-one thousand, seven hundred ninety-seven".