97172811 has 16 divisors (see below), whose sum is σ = 144698400. Its totient is φ = 64449504.

The previous prime is 97172759. The next prime is 97172837. The reversal of 97172811 is 11827179.

It is not a de Polignac number, because 97172811 - 2¹¹ = 97170763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97172611) 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, 3816 + ... + 14453.

It is an arithmetic number, because the mean of its divisors is an integer number (9043650).

Almost surely, 2^97172811 is an apocalyptic number.

97172811 is a deficient number, since it is larger than the sum of its proper divisors (47525589).

97172811 is a wasteful number, since it uses less digits than its factorization.

97172811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18475 (or 18469 counting only the distinct ones).

The product of its digits is 7056, while the sum is 36.

The square root of 97172811 is about 9857.6270471143. The cubic root of 97172811 is about 459.7427846827.

The spelling of 97172811 in words is "ninety-seven million, one hundred seventy-two thousand, eight hundred eleven".