86691442 has 8 divisors (see below), whose sum is σ = 131818716. Its totient is φ = 42751872.

The previous prime is 86691427. The next prime is 86691457. The reversal of 86691442 is 24419668.

It is an interprime number because it is at equal distance from previous prime (86691427) and next prime (86691457).

It can be written as a sum of positive squares in 2 ways, for example, as 85729081 + 962361 = 9259^2 + 981^2 .

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

It is a super-2 number, since 2×86691442² = 15030812232078728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 86691395 and 86691404.

It is an unprimeable number.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296743 + ... + 297034.

Almost surely, 2^86691442 is an apocalyptic number.

86691442 is a deficient number, since it is larger than the sum of its proper divisors (45127274).

86691442 is a wasteful number, since it uses less digits than its factorization.

86691442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593852.

The product of its digits is 82944, while the sum is 40.

The square root of 86691442 is about 9310.8239162815. The cubic root of 86691442 is about 442.5802967480.

The spelling of 86691442 in words is "eighty-six million, six hundred ninety-one thousand, four hundred forty-two".