47491394 has 16 divisors (see below), whose sum is σ = 72353400. Its totient is φ = 23376384.

The previous prime is 47491363. The next prime is 47491397. The reversal of 47491394 is 49319474.

It can be written as a sum of positive squares in 4 ways, for example, as 46063369 + 1428025 = 6787^2 + 1195^2 .

It is not an unprimeable number, because it can be changed into a prime (47491397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43892 + ... + 44960.

Almost surely, 2^47491394 is an apocalyptic number.

47491394 is a deficient number, since it is larger than the sum of its proper divisors (24862006).

47491394 is a wasteful number, since it uses less digits than its factorization.

47491394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397.

The product of its digits is 108864, while the sum is 41.

The square root of 47491394 is about 6891.4000029022. The cubic root of 47491394 is about 362.1359490601.

The spelling of 47491394 in words is "forty-seven million, four hundred ninety-one thousand, three hundred ninety-four".