49198157 has 2 divisors, whose sum is σ = 49198158. Its totient is φ = 49198156.

The previous prime is 49198141. The next prime is 49198159. The reversal of 49198157 is 75189194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47803396 + 1394761 = 6914^2 + 1181^2 .

It is a cyclic number.

It is not a de Polignac number, because 49198157 - 2⁴ = 49198141 is a prime.

Together with 49198159, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49198159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24599078 + 24599079.

It is an arithmetic number, because the mean of its divisors is an integer number (24599079).

Almost surely, 2^49198157 is an apocalyptic number.

It is an amenable number.

49198157 is a deficient number, since it is larger than the sum of its proper divisors (1).

49198157 is an equidigital number, since it uses as much as digits as its factorization.

49198157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 44.

The square root of 49198157 is about 7014.1397904519. The cubic root of 49198157 is about 366.4231844506.

The spelling of 49198157 in words is "forty-nine million, one hundred ninety-eight thousand, one hundred fifty-seven".