1405478839 has 2 divisors, whose sum is σ = 1405478840. Its totient is φ = 1405478838.

The previous prime is 1405478827. The next prime is 1405478843. The reversal of 1405478839 is 9388745041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1405478839 - 2²⁷ = 1271261111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1405478792 and 1405478801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1405478819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702739419 + 702739420.

It is an arithmetic number, because the mean of its divisors is an integer number (702739420).

Almost surely, 2^1405478839 is an apocalyptic number.

1405478839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405478839 is an equidigital number, since it uses as much as digits as its factorization.

1405478839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 49.

The square root of 1405478839 is about 37489.7164433128. The cubic root of 1405478839 is about 1120.1463560335.

The spelling of 1405478839 in words is "one billion, four hundred five million, four hundred seventy-eight thousand, eight hundred thirty-nine".