1400540389 has 2 divisors, whose sum is σ = 1400540390. Its totient is φ = 1400540388.

The previous prime is 1400540381. The next prime is 1400540473. The reversal of 1400540389 is 9830450041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1245737025 + 154803364 = 35295^2 + 12442^2 .

It is an emirp because it is prime and its reverse (9830450041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1400540389 - 2³ = 1400540381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1400540381) 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, 700270194 + 700270195.

It is an arithmetic number, because the mean of its divisors is an integer number (700270195).

Almost surely, 2^1400540389 is an apocalyptic number.

It is an amenable number.

1400540389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400540389 is an equidigital number, since it uses as much as digits as its factorization.

1400540389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 1400540389 is about 37423.7944228000. The cubic root of 1400540389 is about 1118.8328586134.

The spelling of 1400540389 in words is "one billion, four hundred million, five hundred forty thousand, three hundred eighty-nine".