1401689719 has 2 divisors, whose sum is σ = 1401689720. Its totient is φ = 1401689718.

The previous prime is 1401689711. The next prime is 1401689749. The reversal of 1401689719 is 9179861041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1401689719 - 2³ = 1401689711 is a prime.

It is a super-2 number, since 2×1401689719² = 3929468136700597922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1401689711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700844859 + 700844860.

It is an arithmetic number, because the mean of its divisors is an integer number (700844860).

Almost surely, 2^1401689719 is an apocalyptic number.

1401689719 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401689719 is an equidigital number, since it uses as much as digits as its factorization.

1401689719 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 46.

The square root of 1401689719 is about 37439.1468786349. The cubic root of 1401689719 is about 1119.1388254118.

The spelling of 1401689719 in words is "one billion, four hundred one million, six hundred eighty-nine thousand, seven hundred nineteen".