77909963 has 8 divisors (see below), whose sum is σ = 84505680. Its totient is φ = 71537920.

The previous prime is 77909959. The next prime is 77909983. The reversal of 77909963 is 36990977.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77909963 - 2² = 77909959 is a prime.

It is a super-2 number, since 2×77909963² = 12139924669322738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77909903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55193 + ... + 56586.

It is an arithmetic number, because the mean of its divisors is an integer number (10563210).

Almost surely, 2^77909963 is an apocalyptic number.

77909963 is a deficient number, since it is larger than the sum of its proper divisors (6595717).

77909963 is a wasteful number, since it uses less digits than its factorization.

77909963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111837.

The product of its (nonzero) digits is 642978, while the sum is 50.

The square root of 77909963 is about 8826.6620531206. The cubic root of 77909963 is about 427.1014042869.

The spelling of 77909963 in words is "seventy-seven million, nine hundred nine thousand, nine hundred sixty-three".