1400140817 has 2 divisors, whose sum is σ = 1400140818. Its totient is φ = 1400140816.

The previous prime is 1400140811. The next prime is 1400140829. The reversal of 1400140817 is 7180410041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1023936001 + 376204816 = 31999^2 + 19396^2 .

It is a cyclic number.

It is not a de Polignac number, because 1400140817 - 2²⁴ = 1383363601 is a prime.

It is not a weakly prime, because it can be changed into another prime (1400140811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700070408 + 700070409.

It is an arithmetic number, because the mean of its divisors is an integer number (700070409).

Almost surely, 2^1400140817 is an apocalyptic number.

It is an amenable number.

1400140817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400140817 is an equidigital number, since it uses as much as digits as its factorization.

1400140817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 1400140817 is about 37418.4555667387. The cubic root of 1400140817 is about 1118.7264480670.

Adding to 1400140817 its reverse (7180410041), we get a palindrome (8580550858).

The spelling of 1400140817 in words is "one billion, four hundred million, one hundred forty thousand, eight hundred seventeen".