328949531 has 2 divisors, whose sum is σ = 328949532. Its totient is φ = 328949530.

The previous prime is 328949521. The next prime is 328949549. The reversal of 328949531 is 135949823.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 328949531 - 2¹⁴ = 328933147 is a prime.

It is a super-2 number, since 2×328949531² = 216415587890239922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (328949521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164474765 + 164474766.

It is an arithmetic number, because the mean of its divisors is an integer number (164474766).

Almost surely, 2^328949531 is an apocalyptic number.

328949531 is a deficient number, since it is larger than the sum of its proper divisors (1).

328949531 is an equidigital number, since it uses as much as digits as its factorization.

328949531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 44.

The square root of 328949531 is about 18136.9658708396. The cubic root of 328949531 is about 690.3082925359.

The spelling of 328949531 in words is "three hundred twenty-eight million, nine hundred forty-nine thousand, five hundred thirty-one".