800139407 has 2 divisors, whose sum is σ = 800139408. Its totient is φ = 800139406.

The previous prime is 800139397. The next prime is 800139409. The reversal of 800139407 is 704931008.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 800139407 - 2¹⁶ = 800073871 is a prime.

Together with 800139409, 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 (800139409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400069703 + 400069704.

It is an arithmetic number, because the mean of its divisors is an integer number (400069704).

Almost surely, 2^800139407 is an apocalyptic number.

800139407 is a deficient number, since it is larger than the sum of its proper divisors (1).

800139407 is an equidigital number, since it uses as much as digits as its factorization.

800139407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 800139407 is about 28286.7355309870. The cubic root of 800139407 is about 928.3716860886.

The spelling of 800139407 in words is "eight hundred million, one hundred thirty-nine thousand, four hundred seven".