47436581 has 2 divisors, whose sum is σ = 47436582. Its totient is φ = 47436580.

The previous prime is 47436563. The next prime is 47436593. The reversal of 47436581 is 18563474.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40119556 + 7317025 = 6334^2 + 2705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47436581 is a prime.

It is a super-2 number, since 2×47436581² = 4500458433939122, which contains 22 as substring.

It is a Chen prime.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47436551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23718290 + 23718291.

It is an arithmetic number, because the mean of its divisors is an integer number (23718291).

Almost surely, 2^47436581 is an apocalyptic number.

It is an amenable number.

47436581 is a deficient number, since it is larger than the sum of its proper divisors (1).

47436581 is an equidigital number, since it uses as much as digits as its factorization.

47436581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 38.

The square root of 47436581 is about 6887.4219414814. The cubic root of 47436581 is about 361.9965736375.

The spelling of 47436581 in words is "forty-seven million, four hundred thirty-six thousand, five hundred eighty-one".