47016989 has 4 divisors (see below), whose sum is σ = 47904156. Its totient is φ = 46129824.

The previous prime is 47016979. The next prime is 47017007. The reversal of 47016989 is 98961074.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98961074 = 2 ⋅49480537.

It can be written as a sum of positive squares in 2 ways, for example, as 28440889 + 18576100 = 5333^2 + 4310^2 .

It is a cyclic number.

It is not a de Polignac number, because 47016989 - 2⁸ = 47016733 is a prime.

It is a super-2 number, since 2×47016989² = 4421194509252242, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47016979) 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, 443504 + ... + 443609.

It is an arithmetic number, because the mean of its divisors is an integer number (11976039).

Almost surely, 2^47016989 is an apocalyptic number.

It is an amenable number.

47016989 is a deficient number, since it is larger than the sum of its proper divisors (887167).

47016989 is an equidigital number, since it uses as much as digits as its factorization.

47016989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887166.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 47016989 is about 6856.8935386223. The cubic root of 47016989 is about 360.9260852908.

The spelling of 47016989 in words is "forty-seven million, sixteen thousand, nine hundred eighty-nine".