48405991 has 2 divisors, whose sum is σ = 48405992. Its totient is φ = 48405990.

The previous prime is 48405979. The next prime is 48406031. The reversal of 48405991 is 19950484.

It is an a-pointer prime, because the next prime (48406031) can be obtained adding 48405991 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 48405991 - 2⁹ = 48405479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (48405491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24202995 + 24202996.

It is an arithmetic number, because the mean of its divisors is an integer number (24202996).

Almost surely, 2^48405991 is an apocalyptic number.

48405991 is a deficient number, since it is larger than the sum of its proper divisors (1).

48405991 is an equidigital number, since it uses as much as digits as its factorization.

48405991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 48405991 is about 6957.4414118985. The cubic root of 48405991 is about 364.4458746357.

The spelling of 48405991 in words is "forty-eight million, four hundred five thousand, nine hundred ninety-one".