86906738 has 4 divisors (see below), whose sum is σ = 130360110. Its totient is φ = 43453368.

The previous prime is 86906731. The next prime is 86906759. The reversal of 86906738 is 83760968.

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

It can be written as a sum of positive squares in only one way, i.e., 68442529 + 18464209 = 8273^2 + 4297^2 .

It is a super-2 number, since 2×86906738² = 15105562219601288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 86906692 and 86906701.

It is not an unprimeable number, because it can be changed into a prime (86906731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21726683 + ... + 21726686.

Almost surely, 2^86906738 is an apocalyptic number.

86906738 is a deficient number, since it is larger than the sum of its proper divisors (43453372).

86906738 is a wasteful number, since it uses less digits than its factorization.

86906738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43453371.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 86906738 is about 9322.3783446071. The cubic root of 86906738 is about 442.9463728531.

The spelling of 86906738 in words is "eighty-six million, nine hundred six thousand, seven hundred thirty-eight".