90912101 has 6 divisors (see below), whose sum is σ = 105754950. Its totient is φ = 77924616.

The previous prime is 90912091. The next prime is 90912121. The reversal of 90912101 is 10121909.

It can be written as a sum of positive squares in only one way, i.e., 50779876 + 40132225 = 7126^2 + 6335^2 .

It is not a de Polignac number, because 90912101 - 2⁶ = 90912037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90912121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 927626 + ... + 927723.

It is an arithmetic number, because the mean of its divisors is an integer number (17625825).

Almost surely, 2^90912101 is an apocalyptic number.

It is an amenable number.

90912101 is a deficient number, since it is larger than the sum of its proper divisors (14842849).

90912101 is a wasteful number, since it uses less digits than its factorization.

90912101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855363 (or 1855356 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 90912101 is about 9534.7837416483. The cubic root of 90912101 is about 449.6492756921.

It can be divided in two parts, 9091 and 2101, that multiplied together give a palindrome (19100191).

The spelling of 90912101 in words is "ninety million, nine hundred twelve thousand, one hundred one".