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63947421 = 33171271097
BaseRepresentation
bin1111001111110…
…0001010011101
311110022212101000
43303330022131
5112332304141
610202340513
71404354426
oct363741235
9143285330
1063947421
113310770a
12194ba739
131032c915
1486c864d
1559325b6
hex3cfc29d

63947421 has 32 divisors (see below), whose sum is σ = 101191680. Its totient is φ = 39771648.

The previous prime is 63947417. The next prime is 63947423. The reversal of 63947421 is 12474936.

It is not a de Polignac number, because 63947421 - 22 = 63947417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63947423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57745 + ... + 58841.

It is an arithmetic number, because the mean of its divisors is an integer number (3162240).

Almost surely, 263947421 is an apocalyptic number.

It is an amenable number.

63947421 is a deficient number, since it is larger than the sum of its proper divisors (37244259).

63947421 is a wasteful number, since it uses less digits than its factorization.

63947421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250 (or 1244 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 63947421 is about 7996.7131372833. The cubic root of 63947421 is about 399.8904304057.

The spelling of 63947421 in words is "sixty-three million, nine hundred forty-seven thousand, four hundred twenty-one".

Divisors: 1 3 9 17 27 51 127 153 381 459 1097 1143 2159 3291 3429 6477 9873 18649 19431 29619 55947 58293 139319 167841 417957 503523 1253871 2368423 3761613 7105269 21315807 63947421