990719534 has 24 divisors (see below), whose sum is σ = 1738392840. Its totient is φ = 422214576.

The previous prime is 990719479. The next prime is 990719537. The reversal of 990719534 is 435917099.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990719537) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10697 + ... + 45780.

It is an arithmetic number, because the mean of its divisors is an integer number (72433035).

Almost surely, 2^990719534 is an apocalyptic number.

990719534 is a deficient number, since it is larger than the sum of its proper divisors (747673306).

990719534 is a wasteful number, since it uses less digits than its factorization.

990719534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56672 (or 56665 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 47.

The square root of 990719534 is about 31475.6975141140. The cubic root of 990719534 is about 996.8968920144.

The spelling of 990719534 in words is "nine hundred ninety million, seven hundred nineteen thousand, five hundred thirty-four".