1002796397 has 4 divisors (see below), whose sum is σ = 1002862176. Its totient is φ = 1002730620.

The previous prime is 1002796337. The next prime is 1002796427. The reversal of 1002796397 is 7936972001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7936972001 = 7 ⋅1133853143.

It is a cyclic number.

It is not a de Polignac number, because 1002796397 - 2²² = 998602093 is a prime.

It is a super-2 number, since 2×1002796397² = 2011201227672363218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002796337) 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, 3122 + ... + 44892.

It is an arithmetic number, because the mean of its divisors is an integer number (250715544).

Almost surely, 2^1002796397 is an apocalyptic number.

It is an amenable number.

1002796397 is a deficient number, since it is larger than the sum of its proper divisors (65779).

1002796397 is an equidigital number, since it uses as much as digits as its factorization.

1002796397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65778.

The product of its (nonzero) digits is 142884, while the sum is 44.

The square root of 1002796397 is about 31666.9606530213. The cubic root of 1002796397 is about 1000.9312648100.

The spelling of 1002796397 in words is "one billion, two million, seven hundred ninety-six thousand, three hundred ninety-seven".