48998991 has 4 divisors (see below), whose sum is σ = 65331992. Its totient is φ = 32665992.

The previous prime is 48998959. The next prime is 48999011. The reversal of 48998991 is 19989984.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 48998991 - 2⁵ = 48998959 is a prime.

It is a super-2 number, since 2×48998991² = 4801802238036162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (48998291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8166496 + ... + 8166501.

It is an arithmetic number, because the mean of its divisors is an integer number (16332998).

Almost surely, 2^48998991 is an apocalyptic number.

48998991 is a deficient number, since it is larger than the sum of its proper divisors (16333001).

48998991 is a wasteful number, since it uses less digits than its factorization.

48998991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16333000.

The product of its digits is 1679616, while the sum is 57.

The square root of 48998991 is about 6999.9279282004. The cubic root of 48998991 is about 365.9280592575.

The spelling of 48998991 in words is "forty-eight million, nine hundred ninety-eight thousand, nine hundred ninety-one".