48897781 has 2 divisors, whose sum is σ = 48897782. Its totient is φ = 48897780.

The previous prime is 48897769. The next prime is 48897787. The reversal of 48897781 is 18779884.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35640900 + 13256881 = 5970^2 + 3641^2 .

It is a cyclic number.

It is not a de Polignac number, because 48897781 - 2⁹ = 48897269 is a prime.

It is a super-2 number, since 2×48897781² = 4781985973447922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (48897787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24448890 + 24448891.

It is an arithmetic number, because the mean of its divisors is an integer number (24448891).

Almost surely, 2^48897781 is an apocalyptic number.

It is an amenable number.

48897781 is a deficient number, since it is larger than the sum of its proper divisors (1).

48897781 is an equidigital number, since it uses as much as digits as its factorization.

48897781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 903168, while the sum is 52.

The square root of 48897781 is about 6992.6948310362. The cubic root of 48897781 is about 365.6759376861.

The spelling of 48897781 in words is "forty-eight million, eight hundred ninety-seven thousand, seven hundred eighty-one".