97212919 has 4 divisors (see below), whose sum is σ = 102931344. Its totient is φ = 91494496.

The previous prime is 97212917. The next prime is 97212923. The reversal of 97212919 is 91921279.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 97212919 - 2¹ = 97212917 is a prime.

It is a super-2 number, since 2×97212919² = 18900703241001122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97212917) 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, 2859187 + ... + 2859220.

It is an arithmetic number, because the mean of its divisors is an integer number (25732836).

Almost surely, 2^97212919 is an apocalyptic number.

97212919 is a deficient number, since it is larger than the sum of its proper divisors (5718425).

97212919 is a wasteful number, since it uses less digits than its factorization.

97212919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5718424.

The product of its digits is 20412, while the sum is 40.

The square root of 97212919 is about 9859.6612010758. The cubic root of 97212919 is about 459.8060288044.

The spelling of 97212919 in words is "ninety-seven million, two hundred twelve thousand, nine hundred nineteen".