1396398247 has 4 divisors (see below), whose sum is σ = 1426108896. Its totient is φ = 1366687600.

The previous prime is 1396398221. The next prime is 1396398307. The reversal of 1396398247 is 7428936931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1396398247 - 2¹⁵ = 1396365479 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1396398194 and 1396398203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1396398347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14855254 + ... + 14855347.

It is an arithmetic number, because the mean of its divisors is an integer number (356527224).

Almost surely, 2^1396398247 is an apocalyptic number.

1396398247 is a deficient number, since it is larger than the sum of its proper divisors (29710649).

1396398247 is an equidigital number, since it uses as much as digits as its factorization.

1396398247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29710648.

The product of its digits is 1959552, while the sum is 52.

The square root of 1396398247 is about 37368.4124227937. The cubic root of 1396398247 is about 1117.7287750535.

The spelling of 1396398247 in words is "one billion, three hundred ninety-six million, three hundred ninety-eight thousand, two hundred forty-seven".