47251987 has 2 divisors, whose sum is σ = 47251988. Its totient is φ = 47251986.

The previous prime is 47251943. The next prime is 47251999. The reversal of 47251987 is 78915274.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47251987 is a prime.

It is not a weakly prime, because it can be changed into another prime (47251927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23625993 + 23625994.

It is an arithmetic number, because the mean of its divisors is an integer number (23625994).

Almost surely, 2^47251987 is an apocalyptic number.

47251987 is a deficient number, since it is larger than the sum of its proper divisors (1).

47251987 is an equidigital number, since it uses as much as digits as its factorization.

47251987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 43.

The square root of 47251987 is about 6874.0080738969. The cubic root of 47251987 is about 361.5264072300.

The spelling of 47251987 in words is "forty-seven million, two hundred fifty-one thousand, nine hundred eighty-seven".