990280497 has 8 divisors (see below), whose sum is σ = 1351080544. Its totient is φ = 644833728.

The previous prime is 990280493. The next prime is 990280541. The reversal of 990280497 is 794082099.

It is a happy number.

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

It is not a de Polignac number, because 990280497 - 2² = 990280493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990280493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3838168 + ... + 3838425.

It is an arithmetic number, because the mean of its divisors is an integer number (168885068).

Almost surely, 2^990280497 is an apocalyptic number.

It is an amenable number.

990280497 is a deficient number, since it is larger than the sum of its proper divisors (360800047).

990280497 is a wasteful number, since it uses less digits than its factorization.

990280497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7676639.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 990280497 is about 31468.7225193524. The cubic root of 990280497 is about 996.7496120919.

The spelling of 990280497 in words is "nine hundred ninety million, two hundred eighty thousand, four hundred ninety-seven".