16973907397 has 16 divisors (see below), whose sum is σ = 18322559424. Its totient is φ = 15665760000.

The previous prime is 16973907337. The next prime is 16973907407. The reversal of 16973907397 is 79370937961.

It is a cyclic number.

It is not a de Polignac number, because 16973907397 - 2¹⁹ = 16973383109 is a prime.

It is a super-2 number, since 2×16973907397² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16973907337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 318522 + ... + 367972.

It is an arithmetic number, because the mean of its divisors is an integer number (1145159964).

Almost surely, 2^16973907397 is an apocalyptic number.

16973907397 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16973907397 is a deficient number, since it is larger than the sum of its proper divisors (1348652027).

16973907397 is a wasteful number, since it uses less digits than its factorization.

16973907397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49860.

The product of its (nonzero) digits is 13502538, while the sum is 61.

The spelling of 16973907397 in words is "sixteen billion, nine hundred seventy-three million, nine hundred seven thousand, three hundred ninety-seven".