16697970 has 24 divisors (see below), whose sum is σ = 43414956. Its totient is φ = 4452768.

The previous prime is 16697969. The next prime is 16697981. The reversal of 16697970 is 7979661.

It can be written as a sum of positive squares in 2 ways, for example, as 14768649 + 1929321 = 3843^2 + 1389^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92677 + ... + 92856.

Almost surely, 2^16697970 is an apocalyptic number.

16697970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16697970 is an abundant number, since it is smaller than the sum of its proper divisors (26716986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16697970 is a wasteful number, since it uses less digits than its factorization.

16697970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185546 (or 185543 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 45.

The square root of 16697970 is about 4086.3149658341. The cubic root of 16697970 is about 255.5962977121.

The spelling of 16697970 in words is "sixteen million, six hundred ninety-seven thousand, nine hundred seventy".