90748261 has 4 divisors (see below), whose sum is σ = 96086412. Its totient is φ = 85410112.

The previous prime is 90748241. The next prime is 90748267. The reversal of 90748261 is 16284709.

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 67650625 + 23097636 = 8225^2 + 4806^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90748261 is a prime.

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 90748261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90748267) 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, 2669050 + ... + 2669083.

It is an arithmetic number, because the mean of its divisors is an integer number (24021603).

Almost surely, 2^90748261 is an apocalyptic number.

It is an amenable number.

90748261 is a deficient number, since it is larger than the sum of its proper divisors (5338151).

90748261 is a wasteful number, since it uses less digits than its factorization.

90748261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5338150.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 90748261 is about 9526.1881673626. The cubic root of 90748261 is about 449.3789969036.

The spelling of 90748261 in words is "ninety million, seven hundred forty-eight thousand, two hundred sixty-one".