47632421 has 2 divisors, whose sum is σ = 47632422. Its totient is φ = 47632420.

The previous prime is 47632397. The next prime is 47632439. The reversal of 47632421 is 12423674.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26112100 + 21520321 = 5110^2 + 4639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47632421 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 (47632121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23816210 + 23816211.

It is an arithmetic number, because the mean of its divisors is an integer number (23816211).

Almost surely, 2^47632421 is an apocalyptic number.

It is an amenable number.

47632421 is a deficient number, since it is larger than the sum of its proper divisors (1).

47632421 is an equidigital number, since it uses as much as digits as its factorization.

47632421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 29.

The square root of 47632421 is about 6901.6245189086. The cubic root of 47632421 is about 362.4940523796.

The spelling of 47632421 in words is "forty-seven million, six hundred thirty-two thousand, four hundred twenty-one".