47191537 has 2 divisors, whose sum is σ = 47191538. Its totient is φ = 47191536.

The previous prime is 47191513. The next prime is 47191553. The reversal of 47191537 is 73519174.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23804641 + 23386896 = 4879^2 + 4836^2 .

It is a cyclic number.

It is not a de Polignac number, because 47191537 - 2⁷ = 47191409 is a prime.

It is equal to p_2842498 and since 47191537 and 2842498 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 47191496 and 47191505.

It is not a weakly prime, because it can be changed into another prime (47191237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23595768 + 23595769.

It is an arithmetic number, because the mean of its divisors is an integer number (23595769).

Almost surely, 2^47191537 is an apocalyptic number.

It is an amenable number.

47191537 is a deficient number, since it is larger than the sum of its proper divisors (1).

47191537 is an equidigital number, since it uses as much as digits as its factorization.

47191537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26460, while the sum is 37.

The square root of 47191537 is about 6869.6096686784. The cubic root of 47191537 is about 361.3721731699.

The spelling of 47191537 in words is "forty-seven million, one hundred ninety-one thousand, five hundred thirty-seven".