97988919 has 8 divisors (see below), whose sum is σ = 149316480. Its totient is φ = 55993656.

The previous prime is 97988851. The next prime is 97988939. The reversal of 97988919 is 91988979.

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

It is not a de Polignac number, because 97988919 - 2¹¹ = 97986871 is a prime.

It is a super-2 number, since 2×97988919² = 19203656493577122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97988939) 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, 2333049 + ... + 2333090.

It is an arithmetic number, because the mean of its divisors is an integer number (18664560).

Almost surely, 2^97988919 is an apocalyptic number.

97988919 is a deficient number, since it is larger than the sum of its proper divisors (51327561).

97988919 is a wasteful number, since it uses less digits than its factorization.

97988919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4666149.

The product of its digits is 2939328, while the sum is 60.

The square root of 97988919 is about 9898.9352457726. The cubic root of 97988919 is about 461.0262515969.

Adding to 97988919 its sum of digits (60), we get a palindrome (97988979).

It can be divided in two parts, 979 and 88919, that added together give a palindrome (89898).

The spelling of 97988919 in words is "ninety-seven million, nine hundred eighty-eight thousand, nine hundred nineteen".