91206146 has 4 divisors (see below), whose sum is σ = 136809222. Its totient is φ = 45603072.

The previous prime is 91206133. The next prime is 91206149. The reversal of 91206146 is 64160219.

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., 45711121 + 45495025 = 6761^2 + 6745^2 .

It is a super-2 number, since 2×91206146² = 16637122136346632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91206149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22801535 + ... + 22801538.

Almost surely, 2^91206146 is an apocalyptic number.

91206146 is a deficient number, since it is larger than the sum of its proper divisors (45603076).

91206146 is a wasteful number, since it uses less digits than its factorization.

91206146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45603075.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 91206146 is about 9550.1908881446. The cubic root of 91206146 is about 450.1335340334.

The spelling of 91206146 in words is "ninety-one million, two hundred six thousand, one hundred forty-six".