47797987 has 2 divisors, whose sum is σ = 47797988. Its totient is φ = 47797986.

The previous prime is 47797963. The next prime is 47798021. The reversal of 47797987 is 78979774.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47797987 - 2¹⁵ = 47765219 is a prime.

It is a super-2 number, since 2×47797987² = 4569295122504338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47797927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23898993 + 23898994.

It is an arithmetic number, because the mean of its divisors is an integer number (23898994).

Almost surely, 2^47797987 is an apocalyptic number.

47797987 is a deficient number, since it is larger than the sum of its proper divisors (1).

47797987 is an equidigital number, since it uses as much as digits as its factorization.

47797987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6223392, while the sum is 58.

The square root of 47797987 is about 6913.6088260763. The cubic root of 47797987 is about 362.9135655701.

It can be divided in two parts, 47797 and 987, that added together give a palindrome (48784).

The spelling of 47797987 in words is "forty-seven million, seven hundred ninety-seven thousand, nine hundred eighty-seven".