390731072449 has 4 divisors (see below), whose sum is σ = 390969761364. Its totient is φ = 390492383536.

The previous prime is 390731072429. The next prime is 390731072471. The reversal of 390731072449 is 944270137093.

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

It can be written as a sum of positive squares in 2 ways, for example, as 194960220849 + 195770851600 = 441543^2 + 442460^2 .

It is a cyclic number.

It is not a de Polignac number, because 390731072449 - 2¹³ = 390731064257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390731072419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119342002 + ... + 119345275.

It is an arithmetic number, because the mean of its divisors is an integer number (97742440341).

Almost surely, 2^390731072449 is an apocalyptic number.

It is an amenable number.

390731072449 is a deficient number, since it is larger than the sum of its proper divisors (238688915).

390731072449 is a wasteful number, since it uses less digits than its factorization.

390731072449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238688914.

The product of its (nonzero) digits is 1143072, while the sum is 49.

The spelling of 390731072449 in words is "three hundred ninety billion, seven hundred thirty-one million, seventy-two thousand, four hundred forty-nine".