49981237 has 2 divisors, whose sum is σ = 49981238. Its totient is φ = 49981236.

The previous prime is 49981219. The next prime is 49981247. The reversal of 49981237 is 73218994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30980356 + 19000881 = 5566^2 + 4359^2 .

It is a cyclic number.

It is not a de Polignac number, because 49981237 - 2¹⁹ = 49456949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 49981193 and 49981202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49981247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24990618 + 24990619.

It is an arithmetic number, because the mean of its divisors is an integer number (24990619).

Almost surely, 2^49981237 is an apocalyptic number.

It is an amenable number.

49981237 is a deficient number, since it is larger than the sum of its proper divisors (1).

49981237 is an equidigital number, since it uses as much as digits as its factorization.

49981237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 43.

The square root of 49981237 is about 7069.7409429200. The cubic root of 49981237 is about 368.3570617765.

It can be divided in two parts, 499812 and 37, that added together give a square (499849 = 707²).

The spelling of 49981237 in words is "forty-nine million, nine hundred eighty-one thousand, two hundred thirty-seven".