991334042 has 8 divisors (see below), whose sum is σ = 1488604500. Its totient is φ = 495132544.

The previous prime is 991334033. The next prime is 991334051. The reversal of 991334042 is 240433199.

It is an interprime number because it is at equal distance from previous prime (991334033) and next prime (991334051).

It can be written as a sum of positive squares in 2 ways, for example, as 567344761 + 423989281 = 23819^2 + 20591^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 991333993 and 991334011.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264917 + ... + 268632.

Almost surely, 2^991334042 is an apocalyptic number.

991334042 is a deficient number, since it is larger than the sum of its proper divisors (497270458).

991334042 is a wasteful number, since it uses less digits than its factorization.

991334042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534480.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 991334042 is about 31485.4576272920. The cubic root of 991334042 is about 997.1029626125.

The spelling of 991334042 in words is "nine hundred ninety-one million, three hundred thirty-four thousand, forty-two".