49121971 has 2 divisors, whose sum is σ = 49121972. Its totient is φ = 49121970.

The previous prime is 49121927. The next prime is 49121981. The reversal of 49121971 is 17912194.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 49121971 - 2¹⁵ = 49089203 is a prime.

It is not a weakly prime, because it can be changed into another prime (49121981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24560985 + 24560986.

It is an arithmetic number, because the mean of its divisors is an integer number (24560986).

Almost surely, 2^49121971 is an apocalyptic number.

49121971 is a deficient number, since it is larger than the sum of its proper divisors (1).

49121971 is an equidigital number, since it uses as much as digits as its factorization.

49121971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 34.

The square root of 49121971 is about 7008.7067994032. The cubic root of 49121971 is about 366.2339447120.

The spelling of 49121971 in words is "forty-nine million, one hundred twenty-one thousand, nine hundred seventy-one".