47493157 has 2 divisors, whose sum is σ = 47493158. Its totient is φ = 47493156.

The previous prime is 47493139. The next prime is 47493191. The reversal of 47493157 is 75139474.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26204161 + 21288996 = 5119^2 + 4614^2 .

It is a cyclic number.

It is not a de Polignac number, because 47493157 - 2⁷ = 47493029 is a prime.

It is equal to p_2859565 and since 47493157 and 2859565 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47493557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23746578 + 23746579.

It is an arithmetic number, because the mean of its divisors is an integer number (23746579).

Almost surely, 2^47493157 is an apocalyptic number.

It is an amenable number.

47493157 is a deficient number, since it is larger than the sum of its proper divisors (1).

47493157 is an equidigital number, since it uses as much as digits as its factorization.

47493157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 40.

The square root of 47493157 is about 6891.5279147661. The cubic root of 47493157 is about 362.1404301370.

The spelling of 47493157 in words is "forty-seven million, four hundred ninety-three thousand, one hundred fifty-seven".