13772797 has 4 divisors (see below), whose sum is σ = 13849920. Its totient is φ = 13695676.

The previous prime is 13772753. The next prime is 13772809. The reversal of 13772797 is 79727731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79727731 = 4051 ⋅19681.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13772797 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 (13772497) 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, 38293 + ... + 38650.

It is an arithmetic number, because the mean of its divisors is an integer number (3462480).

Almost surely, 2^13772797 is an apocalyptic number.

It is an amenable number.

13772797 is a deficient number, since it is larger than the sum of its proper divisors (77123).

13772797 is an equidigital number, since it uses as much as digits as its factorization.

13772797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77122.

The product of its digits is 129654, while the sum is 43.

The square root of 13772797 is about 3711.1719173329. The cubic root of 13772797 is about 239.7033197472.

The spelling of 13772797 in words is "thirteen million, seven hundred seventy-two thousand, seven hundred ninety-seven".