1420060391 has 2 divisors, whose sum is σ = 1420060392. Its totient is φ = 1420060390.

The previous prime is 1420060339. The next prime is 1420060403. The reversal of 1420060391 is 1930600241.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1420060391 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1420060391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1420060331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710030195 + 710030196.

It is an arithmetic number, because the mean of its divisors is an integer number (710030196).

Almost surely, 2^1420060391 is an apocalyptic number.

1420060391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420060391 is an equidigital number, since it uses as much as digits as its factorization.

1420060391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1420060391 is about 37683.6886596840. The cubic root of 1420060391 is about 1124.0067984100.

The spelling of 1420060391 in words is "one billion, four hundred twenty million, sixty thousand, three hundred ninety-one".