391742033 has 8 divisors (see below), whose sum is σ = 415514952. Its totient is φ = 368050176.

The previous prime is 391742023. The next prime is 391742053. The reversal of 391742033 is 330247193.

It can be written as a sum of positive squares in 4 ways, for example, as 307230784 + 84511249 = 17528^2 + 9193^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 391742033 - 2¹⁶ = 391676497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (391742023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10160 + ... + 29777.

It is an arithmetic number, because the mean of its divisors is an integer number (51939369).

Almost surely, 2^391742033 is an apocalyptic number.

It is an amenable number.

391742033 is a deficient number, since it is larger than the sum of its proper divisors (23772919).

391742033 is a wasteful number, since it uses less digits than its factorization.

391742033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40531.

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 391742033 is about 19792.4741505452. The cubic root of 391742033 is about 731.7005659395.

The spelling of 391742033 in words is "three hundred ninety-one million, seven hundred forty-two thousand, thirty-three".