90103257 has 6 divisors (see below), whose sum is σ = 130149162. Its totient is φ = 60068832.

The previous prime is 90103219. The next prime is 90103289. The reversal of 90103257 is 75230109.

It can be written as a sum of positive squares in only one way, i.e., 76108176 + 13995081 = 8724^2 + 3741^2 .

It is not a de Polignac number, because 90103257 - 2⁶ = 90103193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90103257.

It is not an unprimeable number, because it can be changed into a prime (90103217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5005728 + ... + 5005745.

It is an arithmetic number, because the mean of its divisors is an integer number (21691527).

Almost surely, 2^90103257 is an apocalyptic number.

It is an amenable number.

90103257 is a deficient number, since it is larger than the sum of its proper divisors (40045905).

90103257 is a wasteful number, since it uses less digits than its factorization.

90103257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10011479 (or 10011476 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 90103257 is about 9492.2735422026. The cubic root of 90103257 is about 448.3117930101.

The spelling of 90103257 in words is "ninety million, one hundred three thousand, two hundred fifty-seven".