990706551 has 8 divisors (see below), whose sum is σ = 1342597104. Its totient is φ = 649643520.

The previous prime is 990706537. The next prime is 990706573. The reversal of 990706551 is 155607099.

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

It is not a de Polignac number, because 990706551 - 2⁹ = 990706039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990706511) 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, 2706666 + ... + 2707031.

It is an arithmetic number, because the mean of its divisors is an integer number (167824638).

Almost surely, 2^990706551 is an apocalyptic number.

990706551 is a deficient number, since it is larger than the sum of its proper divisors (351890553).

990706551 is a wasteful number, since it uses less digits than its factorization.

990706551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5413761.

The product of its (nonzero) digits is 85050, while the sum is 42.

The square root of 990706551 is about 31475.4912749587. The cubic root of 990706551 is about 996.8925373447.

The spelling of 990706551 in words is "nine hundred ninety million, seven hundred six thousand, five hundred fifty-one".