47351639 has 4 divisors (see below), whose sum is σ = 47366856. Its totient is φ = 47336424.

The previous prime is 47351627. The next prime is 47351659. The reversal of 47351639 is 93615374.

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: 93615374 = 2 ⋅46807687.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47351639 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 (47351659) 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, 1064 + ... + 9789.

It is an arithmetic number, because the mean of its divisors is an integer number (11841714).

Almost surely, 2^47351639 is an apocalyptic number.

47351639 is a deficient number, since it is larger than the sum of its proper divisors (15217).

47351639 is a wasteful number, since it uses less digits than its factorization.

47351639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15216.

The product of its digits is 68040, while the sum is 38.

The square root of 47351639 is about 6881.2527202538. The cubic root of 47351639 is about 361.7803756182.

The spelling of 47351639 in words is "forty-seven million, three hundred fifty-one thousand, six hundred thirty-nine".