198626479 has 2 divisors, whose sum is σ = 198626480. Its totient is φ = 198626478.

The previous prime is 198626473. The next prime is 198626497. The reversal of 198626479 is 974626891.

It is a happy number.

Together with next prime (198626497) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198626479 - 2⁹ = 198625967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198626473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99313239 + 99313240.

It is an arithmetic number, because the mean of its divisors is an integer number (99313240).

Almost surely, 2^198626479 is an apocalyptic number.

198626479 is a deficient number, since it is larger than the sum of its proper divisors (1).

198626479 is an equidigital number, since it uses as much as digits as its factorization.

198626479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 52.

The square root of 198626479 is about 14093.4906605851. The cubic root of 198626479 is about 583.4617380098.

The spelling of 198626479 in words is "one hundred ninety-eight million, six hundred twenty-six thousand, four hundred seventy-nine".