90909146 has 4 divisors (see below), whose sum is σ = 136363722. Its totient is φ = 45454572.

The previous prime is 90909127. The next prime is 90909157. The reversal of 90909146 is 64190909.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64190909 = 283 ⋅226823.

It can be written as a sum of positive squares in only one way, i.e., 45495025 + 45414121 = 6745^2 + 6739^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22727285 + ... + 22727288.

Almost surely, 2^90909146 is an apocalyptic number.

90909146 is a deficient number, since it is larger than the sum of its proper divisors (45454576).

90909146 is a wasteful number, since it uses less digits than its factorization.

90909146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45454575.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 90909146 is about 9534.6287814471. The cubic root of 90909146 is about 449.6444038507.

The spelling of 90909146 in words is "ninety million, nine hundred nine thousand, one hundred forty-six".