1397076766 has 4 divisors (see below), whose sum is σ = 2095615152. Its totient is φ = 698538382.

The previous prime is 1397076713. The next prime is 1397076797. The reversal of 1397076766 is 6676707931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6676707931 = 601 ⋅11109331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349269190 + ... + 349269193.

It is an arithmetic number, because the mean of its divisors is an integer number (523903788).

Almost surely, 2^1397076766 is an apocalyptic number.

1397076766 is a deficient number, since it is larger than the sum of its proper divisors (698538386).

1397076766 is an equidigital number, since it uses as much as digits as its factorization.

1397076766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698538385.

The product of its (nonzero) digits is 2000376, while the sum is 52.

The square root of 1397076766 is about 37377.4900976510. The cubic root of 1397076766 is about 1117.9097829687.

The spelling of 1397076766 in words is "one billion, three hundred ninety-seven million, seventy-six thousand, seven hundred sixty-six".