1400839369 has 2 divisors, whose sum is σ = 1400839370. Its totient is φ = 1400839368.

The previous prime is 1400839331. The next prime is 1400839387. The reversal of 1400839369 is 9639380041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 918817344 + 482022025 = 30312^2 + 21955^2 .

It is an emirp because it is prime and its reverse (9639380041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1400839369 - 2¹⁵ = 1400806601 is a prime.

It is a super-2 number, since 2×1400839369² = 3924701875480636322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1400839469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700419684 + 700419685.

It is an arithmetic number, because the mean of its divisors is an integer number (700419685).

Almost surely, 2^1400839369 is an apocalyptic number.

It is an amenable number.

1400839369 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400839369 is an equidigital number, since it uses as much as digits as its factorization.

1400839369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 1400839369 is about 37427.7887270942. The cubic root of 1400839369 is about 1118.9124671346.

The spelling of 1400839369 in words is "one billion, four hundred million, eight hundred thirty-nine thousand, three hundred sixty-nine".