1898279 has 2 divisors, whose sum is σ = 1898280. Its totient is φ = 1898278.

The previous prime is 1898257. The next prime is 1898297. The reversal of 1898279 is 9728981.

Together with next prime (1898297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1898279 - 2⁸ = 1898023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1898209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 949139 + 949140.

It is an arithmetic number, because the mean of its divisors is an integer number (949140).

2^1898279 is an apocalyptic number.

1898279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1898279 is an equidigital number, since it uses as much as digits as its factorization.

1898279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 44.

The square root of 1898279 is about 1377.7804614669. The cubic root of 1898279 is about 123.8188257757.

The spelling of 1898279 in words is "one million, eight hundred ninety-eight thousand, two hundred seventy-nine".