69897799 has 2 divisors, whose sum is σ = 69897800. Its totient is φ = 69897798.

The previous prime is 69897797. The next prime is 69897803. The reversal of 69897799 is 99779896.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 69897799 - 2¹ = 69897797 is a prime.

Together with 69897797, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 69897799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69897791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34948899 + 34948900.

It is an arithmetic number, because the mean of its divisors is an integer number (34948900).

Almost surely, 2^69897799 is an apocalyptic number.

69897799 is a deficient number, since it is larger than the sum of its proper divisors (1).

69897799 is an equidigital number, since it uses as much as digits as its factorization.

69897799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15431472, while the sum is 64.

The square root of 69897799 is about 8360.4903564325. The cubic root of 69897799 is about 411.9278611089.

The spelling of 69897799 in words is "sixty-nine million, eight hundred ninety-seven thousand, seven hundred ninety-nine".