49180921 has 2 divisors, whose sum is σ = 49180922. Its totient is φ = 49180920.

The previous prime is 49180907. The next prime is 49180927. The reversal of 49180921 is 12908194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43705321 + 5475600 = 6611^2 + 2340^2 .

It is a cyclic number.

It is not a de Polignac number, because 49180921 - 2⁵ = 49180889 is a prime.

It is not a weakly prime, because it can be changed into another prime (49180927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24590460 + 24590461.

It is an arithmetic number, because the mean of its divisors is an integer number (24590461).

Almost surely, 2^49180921 is an apocalyptic number.

It is an amenable number.

49180921 is a deficient number, since it is larger than the sum of its proper divisors (1).

49180921 is an equidigital number, since it uses as much as digits as its factorization.

49180921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 49180921 is about 7012.9110218225. The cubic root of 49180921 is about 366.3803887575.

The spelling of 49180921 in words is "forty-nine million, one hundred eighty thousand, nine hundred twenty-one".