1399298653 has 2 divisors, whose sum is σ = 1399298654. Its totient is φ = 1399298652.

The previous prime is 1399298651. The next prime is 1399298687. The reversal of 1399298653 is 3568929931.

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., 1310222809 + 89075844 = 36197^2 + 9438^2 .

It is a cyclic number.

It is not a de Polignac number, because 1399298653 - 2¹ = 1399298651 is a prime.

It is a super-2 number, since 2×1399298653² = 3916073440575228818, which contains 22 as substring.

Together with 1399298651, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1399298594 and 1399298603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1399298651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699649326 + 699649327.

It is an arithmetic number, because the mean of its divisors is an integer number (699649327).

Almost surely, 2^1399298653 is an apocalyptic number.

It is an amenable number.

1399298653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399298653 is an equidigital number, since it uses as much as digits as its factorization.

1399298653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3149280, while the sum is 55.

The square root of 1399298653 is about 37407.2005501615. The cubic root of 1399298653 is about 1118.5021039418.

The spelling of 1399298653 in words is "one billion, three hundred ninety-nine million, two hundred ninety-eight thousand, six hundred fifty-three".