97728413231 has 4 divisors (see below), whose sum is σ = 98274382200. Its totient is φ = 97182444264.

The previous prime is 97728413219. The next prime is 97728413239. The reversal of 97728413231 is 13231482779.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13231482779 = 887 ⋅14917117.

It is a cyclic number.

It is not a de Polignac number, because 97728413231 - 2¹⁴ = 97728396847 is a prime.

It is a super-2 number, since 2×97728413231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97728413239) 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, 272984216 + ... + 272984573.

It is an arithmetic number, because the mean of its divisors is an integer number (24568595550).

Almost surely, 2^97728413231 is an apocalyptic number.

97728413231 is a deficient number, since it is larger than the sum of its proper divisors (545968969).

97728413231 is a wasteful number, since it uses less digits than its factorization.

97728413231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545968968.

The product of its digits is 508032, while the sum is 47.

The spelling of 97728413231 in words is "ninety-seven billion, seven hundred twenty-eight million, four hundred thirteen thousand, two hundred thirty-one".