49187557 has 2 divisors, whose sum is σ = 49187558. Its totient is φ = 49187556.

The previous prime is 49187549. The next prime is 49187563. The reversal of 49187557 is 75578194.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47761921 + 1425636 = 6911^2 + 1194^2 .

It is a cyclic number.

It is not a de Polignac number, because 49187557 - 2³ = 49187549 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49187507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24593778 + 24593779.

It is an arithmetic number, because the mean of its divisors is an integer number (24593779).

Almost surely, 2^49187557 is an apocalyptic number.

It is an amenable number.

49187557 is a deficient number, since it is larger than the sum of its proper divisors (1).

49187557 is an equidigital number, since it uses as much as digits as its factorization.

49187557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 352800, while the sum is 46.

The square root of 49187557 is about 7013.3841332127. The cubic root of 49187557 is about 366.3968666305.

The spelling of 49187557 in words is "forty-nine million, one hundred eighty-seven thousand, five hundred fifty-seven".