1405771139 has 2 divisors, whose sum is σ = 1405771140. Its totient is φ = 1405771138.

The previous prime is 1405771061. The next prime is 1405771151. The reversal of 1405771139 is 9311775041.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1405771139 is a prime.

It is not a weakly prime, because it can be changed into another prime (1405771039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702885569 + 702885570.

It is an arithmetic number, because the mean of its divisors is an integer number (702885570).

Almost surely, 2^1405771139 is an apocalyptic number.

1405771139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405771139 is an equidigital number, since it uses as much as digits as its factorization.

1405771139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26460, while the sum is 38.

The square root of 1405771139 is about 37493.6146430296. The cubic root of 1405771139 is about 1120.2240036118.

The spelling of 1405771139 in words is "one billion, four hundred five million, seven hundred seventy-one thousand, one hundred thirty-nine".