77286139 has 8 divisors (see below), whose sum is σ = 88397568. Its totient is φ = 66192360.

The previous prime is 77286101. The next prime is 77286149. The reversal of 77286139 is 93168277.

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 a de Polignac number, because none of the positive numbers 2^k-77286139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77286095 and 77286104.

It is not an unprimeable number, because it can be changed into a prime (77286149) 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, 6924 + ... + 14230.

It is an arithmetic number, because the mean of its divisors is an integer number (11049696).

Almost surely, 2^77286139 is an apocalyptic number.

77286139 is a deficient number, since it is larger than the sum of its proper divisors (11111429).

77286139 is a wasteful number, since it uses less digits than its factorization.

77286139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8825.

The product of its digits is 127008, while the sum is 43.

The square root of 77286139 is about 8791.2535511154. The cubic root of 77286139 is about 425.9584165219.

The spelling of 77286139 in words is "seventy-seven million, two hundred eighty-six thousand, one hundred thirty-nine".