90150505 has 4 divisors (see below), whose sum is σ = 108180612. Its totient is φ = 72120400.

The previous prime is 90150469. The next prime is 90150527. The reversal of 90150505 is 50505109.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30382144 + 59768361 = 5512^2 + 7731^2 .

It is not a de Polignac number, because 90150505 - 2¹⁵ = 90117737 is a prime.

It is a super-2 number, since 2×90150505² = 16254227103510050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90150505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9015046 + ... + 9015055.

It is an arithmetic number, because the mean of its divisors is an integer number (27045153).

Almost surely, 2^90150505 is an apocalyptic number.

It is an amenable number.

90150505 is a deficient number, since it is larger than the sum of its proper divisors (18030107).

90150505 is a wasteful number, since it uses less digits than its factorization.

90150505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18030106.

The product of its (nonzero) digits is 1125, while the sum is 25.

The square root of 90150505 is about 9494.7619770061. The cubic root of 90150505 is about 448.3901406561.

The spelling of 90150505 in words is "ninety million, one hundred fifty thousand, five hundred five".