49149157 has 2 divisors, whose sum is σ = 49149158. Its totient is φ = 49149156.

The previous prime is 49149151. The next prime is 49149173. The reversal of 49149157 is 75194194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37527876 + 11621281 = 6126^2 + 3409^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49149157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49149151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24574578 + 24574579.

It is an arithmetic number, because the mean of its divisors is an integer number (24574579).

Almost surely, 2^49149157 is an apocalyptic number.

It is an amenable number.

49149157 is a deficient number, since it is larger than the sum of its proper divisors (1).

49149157 is an equidigital number, since it uses as much as digits as its factorization.

49149157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 40.

The square root of 49149157 is about 7010.6459759426. The cubic root of 49149157 is about 366.3014949319.

The spelling of 49149157 in words is "forty-nine million, one hundred forty-nine thousand, one hundred fifty-seven".