47251999 has 2 divisors, whose sum is σ = 47252000. Its totient is φ = 47251998.

The previous prime is 47251987. The next prime is 47252021. The reversal of 47251999 is 99915274.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47251999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47252999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23625999 + 23626000.

It is an arithmetic number, because the mean of its divisors is an integer number (23626000).

Almost surely, 2^47251999 is an apocalyptic number.

47251999 is a deficient number, since it is larger than the sum of its proper divisors (1).

47251999 is an equidigital number, since it uses as much as digits as its factorization.

47251999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 46.

The square root of 47251999 is about 6874.0089467501. The cubic root of 47251999 is about 361.5264378342.

It can be divided in two parts, 4725 and 1999, that added together give a square (6724 = 82²).

The spelling of 47251999 in words is "forty-seven million, two hundred fifty-one thousand, nine hundred ninety-nine".