90928969 has 2 divisors, whose sum is σ = 90928970. Its totient is φ = 90928968.

The previous prime is 90928967. The next prime is 90928991. The reversal of 90928969 is 96982909.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73188025 + 17740944 = 8555^2 + 4212^2 .

It is a cyclic number.

It is not a de Polignac number, because 90928969 - 2¹ = 90928967 is a prime.

It is a super-4 number, since 4×90928969⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

Together with 90928967, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (90928963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45464484 + 45464485.

It is an arithmetic number, because the mean of its divisors is an integer number (45464485).

Almost surely, 2^90928969 is an apocalyptic number.

It is an amenable number.

90928969 is a deficient number, since it is larger than the sum of its proper divisors (1).

90928969 is an equidigital number, since it uses as much as digits as its factorization.

90928969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 52.

The square root of 90928969 is about 9535.6682513603. The cubic root of 90928969 is about 449.6770835595.

The spelling of 90928969 in words is "ninety million, nine hundred twenty-eight thousand, nine hundred sixty-nine".