63140891 has 4 divisors (see below), whose sum is σ = 68880984. Its totient is φ = 57400800.

The previous prime is 63140887. The next prime is 63140923. The reversal of 63140891 is 19804136.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63140891 - 2² = 63140887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63140851) 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, 2870030 + ... + 2870051.

It is an arithmetic number, because the mean of its divisors is an integer number (17220246).

Almost surely, 2^63140891 is an apocalyptic number.

63140891 is a deficient number, since it is larger than the sum of its proper divisors (5740093).

63140891 is a wasteful number, since it uses less digits than its factorization.

63140891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5740092.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 63140891 is about 7946.1242753936. The cubic root of 63140891 is about 398.2021207661.

The spelling of 63140891 in words is "sixty-three million, one hundred forty thousand, eight hundred ninety-one".