1397449783 has 2 divisors, whose sum is σ = 1397449784. Its totient is φ = 1397449782.

The previous prime is 1397449771. The next prime is 1397449799. The reversal of 1397449783 is 3879447931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1397449783 - 2⁹ = 1397449271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1397449763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698724891 + 698724892.

It is an arithmetic number, because the mean of its divisors is an integer number (698724892).

Almost surely, 2^1397449783 is an apocalyptic number.

1397449783 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397449783 is an equidigital number, since it uses as much as digits as its factorization.

1397449783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 55.

The square root of 1397449783 is about 37382.4796261564. The cubic root of 1397449783 is about 1118.0092674200.

The spelling of 1397449783 in words is "one billion, three hundred ninety-seven million, four hundred forty-nine thousand, seven hundred eighty-three".