47397787 has 4 divisors (see below), whose sum is σ = 47503800. Its totient is φ = 47291776.

The previous prime is 47397781. The next prime is 47397839. The reversal of 47397787 is 78779374.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78779374 = 2 ⋅39389687.

It is a cyclic number.

It is not a de Polignac number, because 47397787 - 2¹⁹ = 46873499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47397781) 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, 52333 + ... + 53230.

It is an arithmetic number, because the mean of its divisors is an integer number (11875950).

Almost surely, 2^47397787 is an apocalyptic number.

47397787 is a deficient number, since it is larger than the sum of its proper divisors (106013).

47397787 is a wasteful number, since it uses less digits than its factorization.

47397787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106012.

The product of its digits is 2074464, while the sum is 52.

The square root of 47397787 is about 6884.6050721882. The cubic root of 47397787 is about 361.8978655325.

It can be divided in two parts, 47397 and 787, that added together give a palindrome (48184).

The spelling of 47397787 in words is "forty-seven million, three hundred ninety-seven thousand, seven hundred eighty-seven".