1390397420789 has 16 divisors (see below), whose sum is σ = 1507480068864. Its totient is φ = 1274764176000.

The previous prime is 1390397420683. The next prime is 1390397420849. The reversal of 1390397420789 is 9870247930931.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1390397420789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390397420189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15015944 + ... + 15108254.

It is an arithmetic number, because the mean of its divisors is an integer number (94217504304).

Almost surely, 2^{1390397420789} is an apocalyptic number.

It is an amenable number.

1390397420789 is a deficient number, since it is larger than the sum of its proper divisors (117082648075).

1390397420789 is a wasteful number, since it uses less digits than its factorization.

1390397420789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100148.

The product of its (nonzero) digits is 20575296, while the sum is 62.

The spelling of 1390397420789 in words is "one trillion, three hundred ninety billion, three hundred ninety-seven million, four hundred twenty thousand, seven hundred eighty-nine".