47887969 has 4 divisors (see below), whose sum is σ = 47903940. Its totient is φ = 47872000.

The previous prime is 47887949. The next prime is 47888003. The reversal of 47887969 is 96978874.

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: 96978874 = 2 ⋅48489437.

It can be written as a sum of positive squares in 2 ways, for example, as 2930944 + 44957025 = 1712^2 + 6705^2 .

It is a cyclic number.

It is not a de Polignac number, because 47887969 - 2⁹ = 47887457 is a prime.

It is a super-2 number, since 2×47887969² = 4586515149889922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47887919) 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, 1984 + ... + 9985.

It is an arithmetic number, because the mean of its divisors is an integer number (11975985).

Almost surely, 2^47887969 is an apocalyptic number.

It is an amenable number.

47887969 is a deficient number, since it is larger than the sum of its proper divisors (15971).

47887969 is a wasteful number, since it uses less digits than its factorization.

47887969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15970.

The product of its digits is 6096384, while the sum is 58.

The square root of 47887969 is about 6920.1133661234. The cubic root of 47887969 is about 363.1411568694.

The spelling of 47887969 in words is "forty-seven million, eight hundred eighty-seven thousand, nine hundred sixty-nine".