97011720 has 192 divisors, whose sum is σ = 357739200. Its totient is φ = 22602240.

The previous prime is 97011703. The next prime is 97011721. The reversal of 97011720 is 2711079.

It is a super-2 number, since 2×97011720² = 18822547634716800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (97011721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 88375 + ... + 89465.

It is an arithmetic number, because the mean of its divisors is an integer number (1863225).

Almost surely, 2^97011720 is an apocalyptic number.

97011720 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97011720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178869600).

97011720 is an abundant number, since it is smaller than the sum of its proper divisors (260727480).

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

97011720 is a wasteful number, since it uses less digits than its factorization.

97011720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140 (or 1133 counting only the distinct ones).

The product of its (nonzero) digits is 882, while the sum is 27.

The square root of 97011720 is about 9849.4527766775. The cubic root of 97011720 is about 459.4885935938.

Adding to 97011720 its reverse (2711079), we get a palindrome (99722799).

The spelling of 97011720 in words is "ninety-seven million, eleven thousand, seven hundred twenty".