990506765 has 8 divisors (see below), whose sum is σ = 1251166560. Its totient is φ = 750699792.

The previous prime is 990506723. The next prime is 990506767. The reversal of 990506765 is 567605099.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 990506765 - 2⁶ = 990506701 is a prime.

It is a super-2 number, since 2×990506765² = 1962207303021530450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990506767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5213099 + ... + 5213288.

It is an arithmetic number, because the mean of its divisors is an integer number (156395820).

Almost surely, 2^990506765 is an apocalyptic number.

990506765 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

990506765 is a deficient number, since it is larger than the sum of its proper divisors (260659795).

990506765 is a wasteful number, since it uses less digits than its factorization.

990506765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10426411.

The product of its (nonzero) digits is 510300, while the sum is 47.

The square root of 990506765 is about 31472.3174392989. The cubic root of 990506765 is about 996.8255216842.

The spelling of 990506765 in words is "nine hundred ninety million, five hundred six thousand, seven hundred sixty-five".