90441457 has 2 divisors, whose sum is σ = 90441458. Its totient is φ = 90441456.

The previous prime is 90441437. The next prime is 90441487. The reversal of 90441457 is 75414409.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81703521 + 8737936 = 9039^2 + 2956^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90441457 is a prime.

It is not a weakly prime, because it can be changed into another prime (90441437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45220728 + 45220729.

It is an arithmetic number, because the mean of its divisors is an integer number (45220729).

Almost surely, 2^90441457 is an apocalyptic number.

It is an amenable number.

90441457 is a deficient number, since it is larger than the sum of its proper divisors (1).

90441457 is an equidigital number, since it uses as much as digits as its factorization.

90441457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 90441457 is about 9510.0713456840. The cubic root of 90441457 is about 448.8720011859.

It can be divided in two parts, 9044 and 1457, that added together give a palindrome (10501).

The spelling of 90441457 in words is "ninety million, four hundred forty-one thousand, four hundred fifty-seven".