391116802 has 4 divisors (see below), whose sum is σ = 586675206. Its totient is φ = 195558400.

The previous prime is 391116799. The next prime is 391116809. The reversal of 391116802 is 208611193.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 249292521 + 141824281 = 15789^2 + 11909^2 .

It is not an unprimeable number, because it can be changed into a prime (391116809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97779199 + ... + 97779202.

Almost surely, 2^391116802 is an apocalyptic number.

391116802 is a deficient number, since it is larger than the sum of its proper divisors (195558404).

391116802 is a wasteful number, since it uses less digits than its factorization.

391116802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195558403.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 391116802 is about 19776.6731782674. The cubic root of 391116802 is about 731.3110872872.

Adding to 391116802 its reverse (208611193), we get a palindrome (599727995).

The spelling of 391116802 in words is "three hundred ninety-one million, one hundred sixteen thousand, eight hundred two".