90748891 has 2 divisors, whose sum is σ = 90748892. Its totient is φ = 90748890.

The previous prime is 90748837. The next prime is 90748927. The reversal of 90748891 is 19884709.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90748891 - 2¹⁵ = 90716123 is a prime.

It is a super-2 number, since 2×90748891² = 16470722435459762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90748291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45374445 + 45374446.

It is an arithmetic number, because the mean of its divisors is an integer number (45374446).

Almost surely, 2^90748891 is an apocalyptic number.

90748891 is a deficient number, since it is larger than the sum of its proper divisors (1).

90748891 is an equidigital number, since it uses as much as digits as its factorization.

90748891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 90748891 is about 9526.2212340466. The cubic root of 90748891 is about 449.3800368064.

The spelling of 90748891 in words is "ninety million, seven hundred forty-eight thousand, eight hundred ninety-one".