90061212 has 24 divisors (see below), whose sum is σ = 214615296. Its totient is φ = 29381488.

The previous prime is 90061207. The next prime is 90061217. The reversal of 90061212 is 21216009.

It is an interprime number because it is at equal distance from previous prime (90061207) and next prime (90061217).

It is a super-2 number, since 2×90061212² = 16222043813817888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90061217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79278 + ... + 80405.

It is an arithmetic number, because the mean of its divisors is an integer number (8942304).

Almost surely, 2^90061212 is an apocalyptic number.

It is an amenable number.

90061212 is an abundant number, since it is smaller than the sum of its proper divisors (124554084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90061212 is a wasteful number, since it uses less digits than its factorization.

90061212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159737 (or 159735 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 90061212 is about 9490.0585878065. The cubic root of 90061212 is about 448.2420500559.

The spelling of 90061212 in words is "ninety million, sixty-one thousand, two hundred twelve".