899691407 has 2 divisors, whose sum is σ = 899691408. Its totient is φ = 899691406.

The previous prime is 899691337. The next prime is 899691409. The reversal of 899691407 is 704196998.

It is a happy number.

899691407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 899691407 - 2¹⁰ = 899690383 is a prime.

Together with 899691409, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (899691409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449845703 + 449845704.

It is an arithmetic number, because the mean of its divisors is an integer number (449845704).

Almost surely, 2^899691407 is an apocalyptic number.

899691407 is a deficient number, since it is larger than the sum of its proper divisors (1).

899691407 is an equidigital number, since it uses as much as digits as its factorization.

899691407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 899691407 is about 29994.8563423798. The cubic root of 899691407 is about 965.3790226333.

The spelling of 899691407 in words is "eight hundred ninety-nine million, six hundred ninety-one thousand, four hundred seven".