47520091 has 4 divisors (see below), whose sum is σ = 47964312. Its totient is φ = 47075872.

The previous prime is 47520079. The next prime is 47520101. The reversal of 47520091 is 19002574.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19002574 = 2 ⋅9501287.

It is a cyclic number.

It is not a de Polignac number, because 47520091 - 2¹³ = 47511899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47520041) 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, 221950 + ... + 222163.

It is an arithmetic number, because the mean of its divisors is an integer number (11991078).

Almost surely, 2^47520091 is an apocalyptic number.

47520091 is a deficient number, since it is larger than the sum of its proper divisors (444221).

47520091 is a wasteful number, since it uses less digits than its factorization.

47520091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444220.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 47520091 is about 6893.4817762869. The cubic root of 47520091 is about 362.2088754155.

The spelling of 47520091 in words is "forty-seven million, five hundred twenty thousand, ninety-one".