47749087 has 2 divisors, whose sum is σ = 47749088. Its totient is φ = 47749086.

The previous prime is 47749061. The next prime is 47749099. The reversal of 47749087 is 78094774.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47749087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47749027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23874543 + 23874544.

It is an arithmetic number, because the mean of its divisors is an integer number (23874544).

Almost surely, 2^47749087 is an apocalyptic number.

47749087 is a deficient number, since it is larger than the sum of its proper divisors (1).

47749087 is an equidigital number, since it uses as much as digits as its factorization.

47749087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 47749087 is about 6910.0714178654. The cubic root of 47749087 is about 362.7897630853.

It can be divided in two parts, 4774 and 9087, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 47749087 in words is "forty-seven million, seven hundred forty-nine thousand, eighty-seven".