63199961 has 16 divisors (see below), whose sum is σ = 72411840. Its totient is φ = 54626880.

The previous prime is 63199957. The next prime is 63199987. The reversal of 63199961 is 16999136.

It is a happy number.

It is not a de Polignac number, because 63199961 - 2² = 63199957 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63199061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19895 + ... + 22851.

It is an arithmetic number, because the mean of its divisors is an integer number (4525740).

Almost surely, 2^63199961 is an apocalyptic number.

It is an amenable number.

63199961 is a deficient number, since it is larger than the sum of its proper divisors (9211879).

63199961 is a wasteful number, since it uses less digits than its factorization.

63199961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3064.

The product of its digits is 78732, while the sum is 44.

The square root of 63199961 is about 7949.8403128616. The cubic root of 63199961 is about 398.3262583238.

The spelling of 63199961 in words is "sixty-three million, one hundred ninety-nine thousand, nine hundred sixty-one".