1399052651 has 2 divisors, whose sum is σ = 1399052652. Its totient is φ = 1399052650.

The previous prime is 1399052647. The next prime is 1399052729. The reversal of 1399052651 is 1562509931.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1562509931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1399052651 - 2² = 1399052647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1399052599 and 1399052608.

It is not a weakly prime, because it can be changed into another prime (1399052051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699526325 + 699526326.

It is an arithmetic number, because the mean of its divisors is an integer number (699526326).

Almost surely, 2^1399052651 is an apocalyptic number.

1399052651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399052651 is an equidigital number, since it uses as much as digits as its factorization.

1399052651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72900, while the sum is 41.

The square root of 1399052651 is about 37403.9122419033. The cubic root of 1399052651 is about 1118.4365544658.

The spelling of 1399052651 in words is "one billion, three hundred ninety-nine million, fifty-two thousand, six hundred fifty-one".