46991947 has 4 divisors (see below), whose sum is σ = 47011320. Its totient is φ = 46972576.

The previous prime is 46991929. The next prime is 46991953. The reversal of 46991947 is 74919964.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-46991947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 46991947.

It is not an unprimeable number, because it can be changed into a prime (46991957) 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, 5422 + ... + 11107.

It is an arithmetic number, because the mean of its divisors is an integer number (11752830).

Almost surely, 2^46991947 is an apocalyptic number.

46991947 is a deficient number, since it is larger than the sum of its proper divisors (19373).

46991947 is a wasteful number, since it uses less digits than its factorization.

46991947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19372.

The product of its digits is 489888, while the sum is 49.

The square root of 46991947 is about 6855.0672498525. The cubic root of 46991947 is about 360.8619955767.

It can be divided in two parts, 469 and 91947, that added together give a square (92416 = 304²).

The spelling of 46991947 in words is "forty-six million, nine hundred ninety-one thousand, nine hundred forty-seven".