80139785 has 16 divisors (see below), whose sum is σ = 111082752. Its totient is φ = 54854400.

The previous prime is 80139781. The next prime is 80139791. The reversal of 80139785 is 58793108.

It is a happy number.

It is not a de Polignac number, because 80139785 - 2² = 80139781 is a prime.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (80139781) 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, 41921 + ... + 43790.

It is an arithmetic number, because the mean of its divisors is an integer number (6942672).

Almost surely, 2^80139785 is an apocalyptic number.

80139785 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

80139785 is a deficient number, since it is larger than the sum of its proper divisors (30942967).

80139785 is a wasteful number, since it uses less digits than its factorization.

80139785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85744.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 80139785 is about 8952.0827185633. The cubic root of 80139785 is about 431.1377566878.

The spelling of 80139785 in words is "eighty million, one hundred thirty-nine thousand, seven hundred eighty-five".