47693991 has 8 divisors (see below), whose sum is σ = 63775600. Its totient is φ = 31704192.

The previous prime is 47693983. The next prime is 47694071. The reversal of 47693991 is 19939674.

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

It is not a de Polignac number, because 47693991 - 2³ = 47693983 is a prime.

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 47693991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47693941) 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, 21730 + ... + 23823.

It is an arithmetic number, because the mean of its divisors is an integer number (7971950).

Almost surely, 2^47693991 is an apocalyptic number.

47693991 is a deficient number, since it is larger than the sum of its proper divisors (16081609).

47693991 is a wasteful number, since it uses less digits than its factorization.

47693991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45905.

The product of its digits is 367416, while the sum is 48.

The square root of 47693991 is about 6906.0836224303. The cubic root of 47693991 is about 362.6501725794.

It can be divided in two parts, 47693 and 991, that added together give a palindrome (48684).

The spelling of 47693991 in words is "forty-seven million, six hundred ninety-three thousand, nine hundred ninety-one".