699868997 has 4 divisors (see below), whose sum is σ = 702359916. Its totient is φ = 697378080.

The previous prime is 699868993. The next prime is 699868999. The reversal of 699868997 is 799868996.

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 386083201 + 313785796 = 19649^2 + 17714^2 .

It is a cyclic number.

It is not a de Polignac number, because 699868997 - 2² = 699868993 is a prime.

It is a super-2 number, since 2×699868997² = 979633225923572018, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 699868997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (699868991) 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, 1245038 + ... + 1245599.

It is an arithmetic number, because the mean of its divisors is an integer number (175589979).

Almost surely, 2^699868997 is an apocalyptic number.

It is an amenable number.

699868997 is a deficient number, since it is larger than the sum of its proper divisors (2490919).

699868997 is a wasteful number, since it uses less digits than its factorization.

699868997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2490918.

The product of its digits is 105815808, while the sum is 71.

The square root of 699868997 is about 26455.0372708110. The cubic root of 699868997 is about 887.8486087212.

Subtracting 699868997 from its reverse (799868996), we obtain a palindrome (99999999).

The spelling of 699868997 in words is "six hundred ninety-nine million, eight hundred sixty-eight thousand, nine hundred ninety-seven".