16747997 has 4 divisors (see below), whose sum is σ = 19140576. Its totient is φ = 14355420.

The previous prime is 16747981. The next prime is 16748003. The reversal of 16747997 is 79974761.

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.

It is a cyclic number.

It is not a de Polignac number, because 16747997 - 2⁴ = 16747981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16747097) 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, 1196279 + ... + 1196292.

It is an arithmetic number, because the mean of its divisors is an integer number (4785144).

Almost surely, 2^16747997 is an apocalyptic number.

It is an amenable number.

16747997 is a deficient number, since it is larger than the sum of its proper divisors (2392579).

16747997 is an equidigital number, since it uses as much as digits as its factorization.

16747997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2392578.

The product of its digits is 666792, while the sum is 50.

The square root of 16747997 is about 4092.4316732231. The cubic root of 16747997 is about 255.8512981215.

The spelling of 16747997 in words is "sixteen million, seven hundred forty-seven thousand, nine hundred ninety-seven".