1798372991 has 2 divisors, whose sum is σ = 1798372992. Its totient is φ = 1798372990.

The previous prime is 1798372951. The next prime is 1798373021. The reversal of 1798372991 is 1992738971.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1798372991 - 2¹⁴ = 1798356607 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1798372951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 899186495 + 899186496.

It is an arithmetic number, because the mean of its divisors is an integer number (899186496).

Almost surely, 2^1798372991 is an apocalyptic number.

1798372991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1798372991 is an equidigital number, since it uses as much as digits as its factorization.

1798372991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1714608, while the sum is 56.

The square root of 1798372991 is about 42407.2280513594. The cubic root of 1798372991 is about 1216.0737776159.

The spelling of 1798372991 in words is "one billion, seven hundred ninety-eight million, three hundred seventy-two thousand, nine hundred ninety-one".