1398798923 has 2 divisors, whose sum is σ = 1398798924. Its totient is φ = 1398798922.

The previous prime is 1398798911. The next prime is 1398798953. The reversal of 1398798923 is 3298978931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1398798923 - 2¹⁰ = 1398797899 is a prime.

It is not a weakly prime, because it can be changed into another prime (1398798953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699399461 + 699399462.

It is an arithmetic number, because the mean of its divisors is an integer number (699399462).

Almost surely, 2^1398798923 is an apocalyptic number.

1398798923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1398798923 is an equidigital number, since it uses as much as digits as its factorization.

1398798923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 59.

The square root of 1398798923 is about 37400.5203573426. The cubic root of 1398798923 is about 1118.3689382764.

The spelling of 1398798923 in words is "one billion, three hundred ninety-eight million, seven hundred ninety-eight thousand, nine hundred twenty-three".