997802801 has 4 divisors (see below), whose sum is σ = 1001596992. Its totient is φ = 994008612.

The previous prime is 997802783. The next prime is 997802807. The reversal of 997802801 is 108208799.

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 an emirpimes, since its reverse is a distinct semiprime: 108208799 = 41 ⋅2639239.

It is a cyclic number.

It is not a de Polignac number, because 997802801 - 2⁶ = 997802737 is a prime.

It is a super-2 number, since 2×997802801² = 1991220859366891202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997802807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1896701 + ... + 1897226.

It is an arithmetic number, because the mean of its divisors is an integer number (250399248).

Almost surely, 2^997802801 is an apocalyptic number.

It is an amenable number.

997802801 is a deficient number, since it is larger than the sum of its proper divisors (3794191).

997802801 is a wasteful number, since it uses less digits than its factorization.

997802801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3794190.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 997802801 is about 31588.0167310327. The cubic root of 997802801 is about 999.2670632683.

The spelling of 997802801 in words is "nine hundred ninety-seven million, eight hundred two thousand, eight hundred one".