47854991 has 2 divisors, whose sum is σ = 47854992. Its totient is φ = 47854990.

The previous prime is 47854969. The next prime is 47854999. The reversal of 47854991 is 19945874.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47854991 is a prime.

It is a super-2 number, since 2×47854991² = 4580200327220162, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47854999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23927495 + 23927496.

It is an arithmetic number, because the mean of its divisors is an integer number (23927496).

Almost surely, 2^47854991 is an apocalyptic number.

47854991 is a deficient number, since it is larger than the sum of its proper divisors (1).

47854991 is an equidigital number, since it uses as much as digits as its factorization.

47854991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 47.

The square root of 47854991 is about 6917.7301913272. The cubic root of 47854991 is about 363.0577788005.

The spelling of 47854991 in words is "forty-seven million, eight hundred fifty-four thousand, nine hundred ninety-one".