77969347 has 4 divisors (see below), whose sum is σ = 78033616. Its totient is φ = 77905080.

The previous prime is 77969341. The next prime is 77969387. The reversal of 77969347 is 74396977.

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 77969347 - 2²³ = 69580739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77969294 and 77969303.

It is not an unprimeable number, because it can be changed into a prime (77969341) 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, 30279 + ... + 32752.

It is an arithmetic number, because the mean of its divisors is an integer number (19508404).

Almost surely, 2^77969347 is an apocalyptic number.

77969347 is a deficient number, since it is larger than the sum of its proper divisors (64269).

77969347 is a wasteful number, since it uses less digits than its factorization.

77969347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64268.

The product of its digits is 2000376, while the sum is 52.

The square root of 77969347 is about 8830.0253114020. The cubic root of 77969347 is about 427.2098908336.

The spelling of 77969347 in words is "seventy-seven million, nine hundred sixty-nine thousand, three hundred forty-seven".