91972343 has 4 divisors (see below), whose sum is σ = 94458120. Its totient is φ = 89486568.

The previous prime is 91972339. The next prime is 91972351. The reversal of 91972343 is 34327919.

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 91972343 - 2² = 91972339 is a prime.

It is a super-3 number, since 3×91972343³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91972297 and 91972306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91972303) 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, 1242833 + ... + 1242906.

It is an arithmetic number, because the mean of its divisors is an integer number (23614530).

Almost surely, 2^91972343 is an apocalyptic number.

91972343 is a deficient number, since it is larger than the sum of its proper divisors (2485777).

91972343 is a wasteful number, since it uses less digits than its factorization.

91972343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2485776.

The product of its digits is 40824, while the sum is 38.

The square root of 91972343 is about 9590.2212174694. The cubic root of 91972343 is about 451.3905022080.

The spelling of 91972343 in words is "ninety-one million, nine hundred seventy-two thousand, three hundred forty-three".