47803997 has 2 divisors, whose sum is σ = 47803998. Its totient is φ = 47803996.

The previous prime is 47803993. The next prime is 47803999. The reversal of 47803997 is 79930874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29365561 + 18438436 = 5419^2 + 4294^2 .

It is a cyclic number.

It is not a de Polignac number, because 47803997 - 2² = 47803993 is a prime.

Together with 47803999, 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 (47803993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23901998 + 23901999.

It is an arithmetic number, because the mean of its divisors is an integer number (23901999).

Almost surely, 2^47803997 is an apocalyptic number.

It is an amenable number.

47803997 is a deficient number, since it is larger than the sum of its proper divisors (1).

47803997 is an equidigital number, since it uses as much as digits as its factorization.

47803997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 47803997 is about 6914.0434624032. The cubic root of 47803997 is about 362.9287755490.

The spelling of 47803997 in words is "forty-seven million, eight hundred three thousand, nine hundred ninety-seven".