998801407 has 2 divisors, whose sum is σ = 998801408. Its totient is φ = 998801406.

The previous prime is 998801393. The next prime is 998801411. The reversal of 998801407 is 704108899.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998801407 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998801417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499400703 + 499400704.

It is an arithmetic number, because the mean of its divisors is an integer number (499400704).

Almost surely, 2^998801407 is an apocalyptic number.

998801407 is a deficient number, since it is larger than the sum of its proper divisors (1).

998801407 is an equidigital number, since it uses as much as digits as its factorization.

998801407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 998801407 is about 31603.8195001807. The cubic root of 998801407 is about 999.6003092686.

The spelling of 998801407 in words is "nine hundred ninety-eight million, eight hundred one thousand, four hundred seven".