1406421739 has 2 divisors, whose sum is σ = 1406421740. Its totient is φ = 1406421738.

The previous prime is 1406421719. The next prime is 1406421761. The reversal of 1406421739 is 9371246041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1406421739 - 2⁵ = 1406421707 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1406421698 and 1406421707.

It is not a weakly prime, because it can be changed into another prime (1406421719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703210869 + 703210870.

It is an arithmetic number, because the mean of its divisors is an integer number (703210870).

Almost surely, 2^1406421739 is an apocalyptic number.

1406421739 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406421739 is an equidigital number, since it uses as much as digits as its factorization.

1406421739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 1406421739 is about 37502.2897834252. The cubic root of 1406421739 is about 1120.3967926032.

The spelling of 1406421739 in words is "one billion, four hundred six million, four hundred twenty-one thousand, seven hundred thirty-nine".