1397345798 has 4 divisors (see below), whose sum is σ = 2096018700. Its totient is φ = 698672898.

The previous prime is 1397345797. The next prime is 1397345813. The reversal of 1397345798 is 8975437931.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397345791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349336448 + ... + 349336451.

It is an arithmetic number, because the mean of its divisors is an integer number (524004675).

Almost surely, 2^1397345798 is an apocalyptic number.

1397345798 is a deficient number, since it is larger than the sum of its proper divisors (698672902).

1397345798 is an equidigital number, since it uses as much as digits as its factorization.

1397345798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698672901.

The product of its digits is 5715360, while the sum is 56.

The square root of 1397345798 is about 37381.0887749407. The cubic root of 1397345798 is about 1117.9815361725.

The spelling of 1397345798 in words is "one billion, three hundred ninety-seven million, three hundred forty-five thousand, seven hundred ninety-eight".