1111621439 has 2 divisors, whose sum is σ = 1111621440. Its totient is φ = 1111621438.

The previous prime is 1111621411. The next prime is 1111621447. The reversal of 1111621439 is 9341261111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111621439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111621499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555810719 + 555810720.

It is an arithmetic number, because the mean of its divisors is an integer number (555810720).

Almost surely, 2^1111621439 is an apocalyptic number.

1111621439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111621439 is an equidigital number, since it uses as much as digits as its factorization.

1111621439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 29.

The square root of 1111621439 is about 33340.9873729018. The cubic root of 1111621439 is about 1035.9027151211.

The spelling of 1111621439 in words is "one billion, one hundred eleven million, six hundred twenty-one thousand, four hundred thirty-nine".