1397274623 has 4 divisors (see below), whose sum is σ = 1435038840. Its totient is φ = 1359510408.

The previous prime is 1397274617. The next prime is 1397274643. The reversal of 1397274623 is 3264727931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3264727931 = 197 ⋅16572223.

It is a cyclic number.

It is not a de Polignac number, because 1397274623 - 2¹⁰ = 1397273599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397274643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18882053 + ... + 18882126.

It is an arithmetic number, because the mean of its divisors is an integer number (358759710).

Almost surely, 2^1397274623 is an apocalyptic number.

1397274623 is a deficient number, since it is larger than the sum of its proper divisors (37764217).

1397274623 is an equidigital number, since it uses as much as digits as its factorization.

1397274623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37764216.

The product of its digits is 381024, while the sum is 44.

The square root of 1397274623 is about 37380.1367439981. The cubic root of 1397274623 is about 1117.9625540692.

The spelling of 1397274623 in words is "one billion, three hundred ninety-seven million, two hundred seventy-four thousand, six hundred twenty-three".