1799221247 has 4 divisors (see below), whose sum is σ = 1801075176. Its totient is φ = 1797367320.

The previous prime is 1799221243. The next prime is 1799221261. The reversal of 1799221247 is 7421229971.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1799221247 - 2² = 1799221243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1799221198 and 1799221207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1799221243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 925508 + ... + 927449.

It is an arithmetic number, because the mean of its divisors is an integer number (450268794).

Almost surely, 2^1799221247 is an apocalyptic number.

1799221247 is a deficient number, since it is larger than the sum of its proper divisors (1853929).

1799221247 is an equidigital number, since it uses as much as digits as its factorization.

1799221247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853928.

The product of its digits is 127008, while the sum is 44.

The square root of 1799221247 is about 42417.2281861981. The cubic root of 1799221247 is about 1216.2649466596.

The spelling of 1799221247 in words is "one billion, seven hundred ninety-nine million, two hundred twenty-one thousand, two hundred forty-seven".