90626281 has 2 divisors, whose sum is σ = 90626282. Its totient is φ = 90626280.

The previous prime is 90626251. The next prime is 90626309. The reversal of 90626281 is 18262609.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85377600 + 5248681 = 9240^2 + 2291^2 .

It is a cyclic number.

It is not a de Polignac number, because 90626281 - 2¹³ = 90618089 is a prime.

It is a super-2 number, since 2×90626281² = 16426245615781922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90626251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45313140 + 45313141.

It is an arithmetic number, because the mean of its divisors is an integer number (45313141).

Almost surely, 2^90626281 is an apocalyptic number.

It is an amenable number.

90626281 is a deficient number, since it is larger than the sum of its proper divisors (1).

90626281 is an equidigital number, since it uses as much as digits as its factorization.

90626281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 90626281 is about 9519.7836635083. The cubic root of 90626281 is about 449.1775611666.

The spelling of 90626281 in words is "ninety million, six hundred twenty-six thousand, two hundred eighty-one".