376991393 has 4 divisors (see below), whose sum is σ = 379170708. Its totient is φ = 374812080.

The previous prime is 376991347. The next prime is 376991399. The reversal of 376991393 is 393199673.

It is a happy number.

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 338265664 + 38725729 = 18392^2 + 6223^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-376991393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (376991399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1089398 + ... + 1089743.

It is an arithmetic number, because the mean of its divisors is an integer number (94792677).

Almost surely, 2^376991393 is an apocalyptic number.

It is an amenable number.

376991393 is a deficient number, since it is larger than the sum of its proper divisors (2179315).

376991393 is a wasteful number, since it uses less digits than its factorization.

376991393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2179314.

The product of its digits is 826686, while the sum is 50.

The square root of 376991393 is about 19416.2661961563. The cubic root of 376991393 is about 722.3990147927.

The spelling of 376991393 in words is "three hundred seventy-six million, nine hundred ninety-one thousand, three hundred ninety-three".