1211199479 has 8 divisors (see below), whose sum is σ = 1457082240. Its totient is φ = 983530296.

The previous prime is 1211199463. The next prime is 1211199497. The reversal of 1211199479 is 9749911121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1211199479 - 2⁴ = 1211199463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211199499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4553249 + ... + 4553514.

It is an arithmetic number, because the mean of its divisors is an integer number (182135280).

Almost surely, 2^1211199479 is an apocalyptic number.

1211199479 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1211199479 is a deficient number, since it is larger than the sum of its proper divisors (245882761).

1211199479 is an equidigital number, since it uses as much as digits as its factorization.

1211199479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9106789.

The product of its digits is 40824, while the sum is 44.

The square root of 1211199479 is about 34802.2912895114. The cubic root of 1211199479 is about 1065.9542327409.

The spelling of 1211199479 in words is "one billion, two hundred eleven million, one hundred ninety-nine thousand, four hundred seventy-nine".