90020102 has 4 divisors (see below), whose sum is σ = 135030156. Its totient is φ = 45010050.

The previous prime is 90020101. The next prime is 90020107. The reversal of 90020102 is 20102009.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90020101) 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, 22505024 + ... + 22505027.

It is an arithmetic number, because the mean of its divisors is an integer number (33757539).

Almost surely, 2^90020102 is an apocalyptic number.

90020102 is a deficient number, since it is larger than the sum of its proper divisors (45010054).

90020102 is a wasteful number, since it uses less digits than its factorization.

90020102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45010053.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 90020102 is about 9487.8923897776. The cubic root of 90020102 is about 448.1738370602.

The spelling of 90020102 in words is "ninety million, twenty thousand, one hundred two".