990748651 has 2 divisors, whose sum is σ = 990748652. Its totient is φ = 990748650.

The previous prime is 990748643. The next prime is 990748699. The reversal of 990748651 is 156847099.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 990748651 - 2³ = 990748643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 990748595 and 990748604.

It is not a weakly prime, because it can be changed into another prime (990748051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495374325 + 495374326.

It is an arithmetic number, because the mean of its divisors is an integer number (495374326).

Almost surely, 2^990748651 is an apocalyptic number.

990748651 is a deficient number, since it is larger than the sum of its proper divisors (1).

990748651 is an equidigital number, since it uses as much as digits as its factorization.

990748651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 990748651 is about 31476.1600421652. The cubic root of 990748651 is about 996.9066581024.

The spelling of 990748651 in words is "nine hundred ninety million, seven hundred forty-eight thousand, six hundred fifty-one".