90551386 has 4 divisors (see below), whose sum is σ = 135827082. Its totient is φ = 45275692.

The previous prime is 90551327. The next prime is 90551387. The reversal of 90551386 is 68315509.

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., 58232161 + 32319225 = 7631^2 + 5685^2 .

It is not an unprimeable number, because it can be changed into a prime (90551387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22637845 + ... + 22637848.

Almost surely, 2^90551386 is an apocalyptic number.

90551386 is a deficient number, since it is larger than the sum of its proper divisors (45275696).

90551386 is a wasteful number, since it uses less digits than its factorization.

90551386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45275695.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 90551386 is about 9515.8492001502. The cubic root of 90551386 is about 449.0537912383.

The spelling of 90551386 in words is "ninety million, five hundred fifty-one thousand, three hundred eighty-six".