97239961861 has 8 divisors (see below), whose sum is σ = 111136438080. Its totient is φ = 83344748928.

The previous prime is 97239961859. The next prime is 97239961919. The reversal of 97239961861 is 16816993279.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 97239961861 - 2¹ = 97239961859 is a prime.

It is a super-2 number, since 2×97239961861² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97239961861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97239961061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144691 + ... + 464128.

It is an arithmetic number, because the mean of its divisors is an integer number (13892054760).

Almost surely, 2^97239961861 is an apocalyptic number.

It is an amenable number.

97239961861 is a deficient number, since it is larger than the sum of its proper divisors (13896476219).

97239961861 is a wasteful number, since it uses less digits than its factorization.

97239961861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631643.

The product of its digits is 8817984, while the sum is 61.

The spelling of 97239961861 in words is "ninety-seven billion, two hundred thirty-nine million, nine hundred sixty-one thousand, eight hundred sixty-one".