1397436769738 has 4 divisors (see below), whose sum is σ = 2096155154610. Its totient is φ = 698718384868.

The previous prime is 1397436769733. The next prime is 1397436769739. The reversal of 1397436769738 is 8379676347931.

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

It can be written as a sum of positive squares in only one way, i.e., 1181149455249 + 216287314489 = 1086807^2 + 465067^2 .

It is not an unprimeable number, because it can be changed into a prime (1397436769733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349359192433 + ... + 349359192436.

Almost surely, 2^{1397436769738} is an apocalyptic number.

1397436769738 is a deficient number, since it is larger than the sum of its proper divisors (698718384872).

1397436769738 is an equidigital number, since it uses as much as digits as its factorization.

1397436769738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698718384871.

The product of its digits is 864162432, while the sum is 73.

The spelling of 1397436769738 in words is "one trillion, three hundred ninety-seven billion, four hundred thirty-six million, seven hundred sixty-nine thousand, seven hundred thirty-eight".