991342532 has 6 divisors (see below), whose sum is σ = 1734849438. Its totient is φ = 495671264.

The previous prime is 991342529. The next prime is 991342553. The reversal of 991342532 is 235243199.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 845995396 + 145347136 = 29086^2 + 12056^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 123917813 + ... + 123917820.

It is an arithmetic number, because the mean of its divisors is an integer number (289141573).

Almost surely, 2^991342532 is an apocalyptic number.

It is an amenable number.

991342532 is a deficient number, since it is larger than the sum of its proper divisors (743506906).

991342532 is a wasteful number, since it uses less digits than its factorization.

991342532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247835637 (or 247835635 counting only the distinct ones).

The product of its digits is 58320, while the sum is 38.

The square root of 991342532 is about 31485.5924511514. The cubic root of 991342532 is about 997.1058090731.

The spelling of 991342532 in words is "nine hundred ninety-one million, three hundred forty-two thousand, five hundred thirty-two".