48997989 has 6 divisors (see below), whose sum is σ = 70774886. Its totient is φ = 32665320.

The previous prime is 48997969. The next prime is 48997999. The reversal of 48997989 is 98979984.

48997989 is a `hidden beast` number, since 489 + 9 + 79 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 25553025 + 23444964 = 5055^2 + 4842^2 .

It is not a de Polignac number, because 48997989 - 2¹¹ = 48995941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (48997939) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2722102 + ... + 2722119.

Almost surely, 2^48997989 is an apocalyptic number.

It is an amenable number.

48997989 is a deficient number, since it is larger than the sum of its proper divisors (21776897).

48997989 is a wasteful number, since it uses less digits than its factorization.

48997989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5444227 (or 5444224 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 63.

The square root of 48997989 is about 6999.8563556690. The cubic root of 48997989 is about 365.9255649040.

The spelling of 48997989 in words is "forty-eight million, nine hundred ninety-seven thousand, nine hundred eighty-nine".