990526331 has 2 divisors, whose sum is σ = 990526332. Its totient is φ = 990526330.

The previous prime is 990526309. The next prime is 990526333. The reversal of 990526331 is 133625099.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 990526331 - 2¹⁰ = 990525307 is a prime.

It is a super-2 number, since 2×990526331² = 1962284824808643122, which contains 22 as substring.

Together with 990526333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (990526333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495263165 + 495263166.

It is an arithmetic number, because the mean of its divisors is an integer number (495263166).

Almost surely, 2^990526331 is an apocalyptic number.

990526331 is a deficient number, since it is larger than the sum of its proper divisors (1).

990526331 is an equidigital number, since it uses as much as digits as its factorization.

990526331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740, while the sum is 38.

The square root of 990526331 is about 31472.6282823663. The cubic root of 990526331 is about 996.8320852468.

The spelling of 990526331 in words is "nine hundred ninety million, five hundred twenty-six thousand, three hundred thirty-one".