48971621 has 2 divisors, whose sum is σ = 48971622. Its totient is φ = 48971620.

The previous prime is 48971579. The next prime is 48971647. The reversal of 48971621 is 12617984.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28622500 + 20349121 = 5350^2 + 4511^2 .

It is a cyclic number.

It is not a de Polignac number, because 48971621 - 2¹⁸ = 48709477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (48971521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24485810 + 24485811.

It is an arithmetic number, because the mean of its divisors is an integer number (24485811).

Almost surely, 2^48971621 is an apocalyptic number.

It is an amenable number.

48971621 is a deficient number, since it is larger than the sum of its proper divisors (1).

48971621 is an equidigital number, since it uses as much as digits as its factorization.

48971621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 38.

The square root of 48971621 is about 6997.9726349851. The cubic root of 48971621 is about 365.8599128449.

The spelling of 48971621 in words is "forty-eight million, nine hundred seventy-one thousand, six hundred twenty-one".