47709387 has 24 divisors (see below), whose sum is σ = 75741120. Its totient is φ = 28698480.

The previous prime is 47709349. The next prime is 47709401. The reversal of 47709387 is 78390774.

It is not a de Polignac number, because 47709387 - 2¹² = 47705291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47709287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12028 + ... + 15494.

It is an arithmetic number, because the mean of its divisors is an integer number (3155880).

Almost surely, 2^47709387 is an apocalyptic number.

47709387 is a deficient number, since it is larger than the sum of its proper divisors (28031733).

47709387 is a wasteful number, since it uses less digits than its factorization.

47709387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3623 (or 3620 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The square root of 47709387 is about 6907.1982018761. The cubic root of 47709387 is about 362.6891905022.

The spelling of 47709387 in words is "forty-seven million, seven hundred nine thousand, three hundred eighty-seven".