1111379999 has 2 divisors, whose sum is σ = 1111380000. Its totient is φ = 1111379998.

The previous prime is 1111379993. The next prime is 1111380019. The reversal of 1111379999 is 9999731111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111379999 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111379993) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555689999 + 555690000.

It is an arithmetic number, because the mean of its divisors is an integer number (555690000).

Almost surely, 2^1111379999 is an apocalyptic number.

1111379999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111379999 is an equidigital number, since it uses as much as digits as its factorization.

1111379999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 137781, while the sum is 50.

The square root of 1111379999 is about 33337.3664076813. The cubic root of 1111379999 is about 1035.8277116314.

The spelling of 1111379999 in words is "one billion, one hundred eleven million, three hundred seventy-nine thousand, nine hundred ninety-nine".