16701997 has 4 divisors (see below), whose sum is σ = 17986780. Its totient is φ = 15417216.

The previous prime is 16701991. The next prime is 16702003. The reversal of 16701997 is 79910761.

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

It is an interprime number because it is at equal distance from previous prime (16701991) and next prime (16702003).

It can be written as a sum of positive squares in 2 ways, for example, as 5851561 + 10850436 = 2419^2 + 3294^2 .

It is a cyclic number.

It is not a de Polignac number, because 16701997 - 2³ = 16701989 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 (16701991) 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, 642372 + ... + 642397.

It is an arithmetic number, because the mean of its divisors is an integer number (4496695).

Almost surely, 2^16701997 is an apocalyptic number.

It is an amenable number.

16701997 is a deficient number, since it is larger than the sum of its proper divisors (1284783).

16701997 is a wasteful number, since it uses less digits than its factorization.

16701997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284782.

The product of its (nonzero) digits is 23814, while the sum is 40.

The square root of 16701997 is about 4086.8076783720. The cubic root of 16701997 is about 255.6168431947.

The spelling of 16701997 in words is "sixteen million, seven hundred one thousand, nine hundred ninety-seven".