90767421 has 12 divisors (see below), whose sum is σ = 131310972. Its totient is φ = 60418176.

The previous prime is 90767393. The next prime is 90767431. The reversal of 90767421 is 12476709.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 88172100 + 2595321 = 9390^2 + 1611^2 .

It is not a de Polignac number, because 90767421 - 2⁹ = 90766909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90767431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1356 + ... + 13541.

It is an arithmetic number, because the mean of its divisors is an integer number (10942581).

Almost surely, 2^90767421 is an apocalyptic number.

It is an amenable number.

90767421 is a deficient number, since it is larger than the sum of its proper divisors (40543551).

90767421 is a wasteful number, since it uses less digits than its factorization.

90767421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15580 (or 15577 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 90767421 is about 9527.1937631183. The cubic root of 90767421 is about 449.4106210016.

The spelling of 90767421 in words is "ninety million, seven hundred sixty-seven thousand, four hundred twenty-one".