47394157 has 2 divisors, whose sum is σ = 47394158. Its totient is φ = 47394156.

The previous prime is 47394143. The next prime is 47394161. The reversal of 47394157 is 75149374.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37319881 + 10074276 = 6109^2 + 3174^2 .

It is a cyclic number.

It is not a de Polignac number, because 47394157 - 2¹¹ = 47392109 is a prime.

It is a super-2 number, since 2×47394157² = 4492412235481298, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47394197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23697078 + 23697079.

It is an arithmetic number, because the mean of its divisors is an integer number (23697079).

Almost surely, 2^47394157 is an apocalyptic number.

It is an amenable number.

47394157 is a deficient number, since it is larger than the sum of its proper divisors (1).

47394157 is an equidigital number, since it uses as much as digits as its factorization.

47394157 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 47394157 is about 6884.3414354606. The cubic root of 47394157 is about 361.8886265442. Note that the first 3 decimals are identical.

The spelling of 47394157 in words is "forty-seven million, three hundred ninety-four thousand, one hundred fifty-seven".