91983047 has 8 divisors (see below), whose sum is σ = 104272560. Its totient is φ = 80438400.

The previous prime is 91983011. The next prime is 91983061. The reversal of 91983047 is 74038919.

It is a happy number.

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

It is not a de Polignac number, because 91983047 - 2¹⁸ = 91720903 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91982995 and 91983013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91983347) 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, 185954 + ... + 186447.

It is an arithmetic number, because the mean of its divisors is an integer number (13034070).

Almost surely, 2^91983047 is an apocalyptic number.

91983047 is a deficient number, since it is larger than the sum of its proper divisors (12289513).

91983047 is a wasteful number, since it uses less digits than its factorization.

91983047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372433.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 91983047 is about 9590.7792696944. The cubic root of 91983047 is about 451.4080128941.

The spelling of 91983047 in words is "ninety-one million, nine hundred eighty-three thousand, forty-seven".