47978641 has 8 divisors (see below), whose sum is σ = 50936040. Its totient is φ = 45036288.

The previous prime is 47978611. The next prime is 47978647. The reversal of 47978641 is 14687974.

It can be written as a sum of positive squares in 4 ways, for example, as 8288641 + 39690000 = 2879^2 + 6300^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 47978641 - 2⁹ = 47978129 is a prime.

It is a super-3 number, since 3×47978641³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47978591 and 47978600.

It is not an unprimeable number, because it can be changed into a prime (47978647) 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, 3195 + ... + 10303.

It is an arithmetic number, because the mean of its divisors is an integer number (6367005).

Almost surely, 2^47978641 is an apocalyptic number.

It is an amenable number.

47978641 is a deficient number, since it is larger than the sum of its proper divisors (2957399).

47978641 is a wasteful number, since it uses less digits than its factorization.

47978641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7523.

The product of its digits is 338688, while the sum is 46.

The square root of 47978641 is about 6926.6616057088. The cubic root of 47978641 is about 363.3702051817.

The spelling of 47978641 in words is "forty-seven million, nine hundred seventy-eight thousand, six hundred forty-one".