47386421 has 2 divisors, whose sum is σ = 47386422. Its totient is φ = 47386420.

The previous prime is 47386403. The next prime is 47386433. The reversal of 47386421 is 12468374.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31696900 + 15689521 = 5630^2 + 3961^2 .

It is a cyclic number.

It is not a de Polignac number, because 47386421 - 2⁶ = 47386357 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47386441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23693210 + 23693211.

It is an arithmetic number, because the mean of its divisors is an integer number (23693211).

Almost surely, 2^47386421 is an apocalyptic number.

It is an amenable number.

47386421 is a deficient number, since it is larger than the sum of its proper divisors (1).

47386421 is an equidigital number, since it uses as much as digits as its factorization.

47386421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 35.

The square root of 47386421 is about 6883.7795577720. The cubic root of 47386421 is about 361.8689354900.

The spelling of 47386421 in words is "forty-seven million, three hundred eighty-six thousand, four hundred twenty-one".