63891141 has 4 divisors (see below), whose sum is σ = 85188192. Its totient is φ = 42594092.

The previous prime is 63891131. The next prime is 63891143. The reversal of 63891141 is 14119836.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63891141 - 2¹⁷ = 63760069 is a prime.

It is a super-3 number, since 3×63891141³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63891143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10648521 + ... + 10648526.

It is an arithmetic number, because the mean of its divisors is an integer number (21297048).

Almost surely, 2^63891141 is an apocalyptic number.

It is an amenable number.

63891141 is a deficient number, since it is larger than the sum of its proper divisors (21297051).

63891141 is a wasteful number, since it uses less digits than its factorization.

63891141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21297050.

The product of its digits is 5184, while the sum is 33.

The square root of 63891141 is about 7993.1934169017. The cubic root of 63891141 is about 399.7730817112.

The spelling of 63891141 in words is "sixty-three million, eight hundred ninety-one thousand, one hundred forty-one".