48481991 has 2 divisors, whose sum is σ = 48481992. Its totient is φ = 48481990.

The previous prime is 48481973. The next prime is 48482017. The reversal of 48481991 is 19918484.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 48481991 - 2¹⁴ = 48465607 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (48481931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24240995 + 24240996.

It is an arithmetic number, because the mean of its divisors is an integer number (24240996).

Almost surely, 2^48481991 is an apocalyptic number.

48481991 is a deficient number, since it is larger than the sum of its proper divisors (1).

48481991 is an equidigital number, since it uses as much as digits as its factorization.

48481991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 44.

The square root of 48481991 is about 6962.9010476956. The cubic root of 48481991 is about 364.6365080869.

The spelling of 48481991 in words is "forty-eight million, four hundred eighty-one thousand, nine hundred ninety-one".