90918241 has 4 divisors (see below), whose sum is σ = 94871232. Its totient is φ = 86965252.

The previous prime is 90918239. The next prime is 90918251. The reversal of 90918241 is 14281909.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14281909 = 197 ⋅72497.

It is a cyclic number.

It is not a de Polignac number, because 90918241 - 2¹ = 90918239 is a prime.

It is a super-2 number, since 2×90918241² = 16532253093068162, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90918197 and 90918206.

It is not an unprimeable number, because it can be changed into a prime (90918251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1976461 + ... + 1976506.

It is an arithmetic number, because the mean of its divisors is an integer number (23717808).

Almost surely, 2^90918241 is an apocalyptic number.

It is an amenable number.

90918241 is a deficient number, since it is larger than the sum of its proper divisors (3952991).

90918241 is a wasteful number, since it uses less digits than its factorization.

90918241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3952990.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 90918241 is about 9535.1057151979. The cubic root of 90918241 is about 449.6593982331.

The spelling of 90918241 in words is "ninety million, nine hundred eighteen thousand, two hundred forty-one".