86781742 has 4 divisors (see below), whose sum is σ = 130172616. Its totient is φ = 43390870.

The previous prime is 86781713. The next prime is 86781749. The reversal of 86781742 is 24718768.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86781749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21695434 + ... + 21695437.

It is an arithmetic number, because the mean of its divisors is an integer number (32543154).

Almost surely, 2^86781742 is an apocalyptic number.

86781742 is a deficient number, since it is larger than the sum of its proper divisors (43390874).

86781742 is a wasteful number, since it uses less digits than its factorization.

86781742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43390873.

The product of its digits is 150528, while the sum is 43.

The square root of 86781742 is about 9315.6718490939. The cubic root of 86781742 is about 442.7339110368.

The spelling of 86781742 in words is "eighty-six million, seven hundred eighty-one thousand, seven hundred forty-two".