1401868289 has 2 divisors, whose sum is σ = 1401868290. Its totient is φ = 1401868288.

The previous prime is 1401868283. The next prime is 1401868301. The reversal of 1401868289 is 9828681041.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1323722689 + 78145600 = 36383^2 + 8840^2 .

It is a cyclic number.

It is not a de Polignac number, because 1401868289 - 2¹² = 1401864193 is a prime.

It is not a weakly prime, because it can be changed into another prime (1401868283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700934144 + 700934145.

It is an arithmetic number, because the mean of its divisors is an integer number (700934145).

Almost surely, 2^1401868289 is an apocalyptic number.

It is an amenable number.

1401868289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401868289 is an equidigital number, since it uses as much as digits as its factorization.

1401868289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 47.

The square root of 1401868289 is about 37441.5316059586. The cubic root of 1401868289 is about 1119.1863480867.

The spelling of 1401868289 in words is "one billion, four hundred one million, eight hundred sixty-eight thousand, two hundred eighty-nine".