77830971 has 8 divisors (see below), whose sum is σ = 105533760. Its totient is φ = 51007752.

The previous prime is 77830969. The next prime is 77831003. The reversal of 77830971 is 17903877.

It is a happy number.

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

It is not a de Polignac number, because 77830971 - 2¹ = 77830969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77834971) 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, 219685 + ... + 220038.

It is an arithmetic number, because the mean of its divisors is an integer number (13191720).

Almost surely, 2^77830971 is an apocalyptic number.

77830971 is a deficient number, since it is larger than the sum of its proper divisors (27702789).

77830971 is a wasteful number, since it uses less digits than its factorization.

77830971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439785.

The product of its (nonzero) digits is 74088, while the sum is 42.

The square root of 77830971 is about 8822.1862936576. The cubic root of 77830971 is about 426.9570111040.

The spelling of 77830971 in words is "seventy-seven million, eight hundred thirty thousand, nine hundred seventy-one".