47506391 has 4 divisors (see below), whose sum is σ = 48402792. Its totient is φ = 46609992.

The previous prime is 47506369. The next prime is 47506427. The reversal of 47506391 is 19360574.

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 47506391 - 2¹⁴ = 47490007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47506301) 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, 448121 + ... + 448226.

It is an arithmetic number, because the mean of its divisors is an integer number (12100698).

Almost surely, 2^47506391 is an apocalyptic number.

47506391 is a deficient number, since it is larger than the sum of its proper divisors (896401).

47506391 is an equidigital number, since it uses as much as digits as its factorization.

47506391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896400.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 47506391 is about 6892.4880123218. The cubic root of 47506391 is about 362.1740639043.

The spelling of 47506391 in words is "forty-seven million, five hundred six thousand, three hundred ninety-one".