47439569 has 2 divisors, whose sum is σ = 47439570. Its totient is φ = 47439568.

The previous prime is 47439533. The next prime is 47439617. The reversal of 47439569 is 96593474.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38588944 + 8850625 = 6212^2 + 2975^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47439569 is a prime.

It is a super-2 number, since 2×47439569² = 4501025413811522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47439169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23719784 + 23719785.

It is an arithmetic number, because the mean of its divisors is an integer number (23719785).

Almost surely, 2^47439569 is an apocalyptic number.

It is an amenable number.

47439569 is a deficient number, since it is larger than the sum of its proper divisors (1).

47439569 is an equidigital number, since it uses as much as digits as its factorization.

47439569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 47.

The square root of 47439569 is about 6887.6388552246. The cubic root of 47439569 is about 362.0041741224.

The spelling of 47439569 in words is "forty-seven million, four hundred thirty-nine thousand, five hundred sixty-nine".