377986993 has 8 divisors (see below), whose sum is σ = 400445640. Its totient is φ = 355553280.

The previous prime is 377986967. The next prime is 377986997. The reversal of 377986993 is 399689773.

It can be written as a sum of positive squares in 4 ways, for example, as 205406224 + 172580769 = 14332^2 + 13137^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-377986993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (377986997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31593 + ... + 41881.

It is an arithmetic number, because the mean of its divisors is an integer number (50055705).

Almost surely, 2^377986993 is an apocalyptic number.

It is an amenable number.

377986993 is a deficient number, since it is larger than the sum of its proper divisors (22458647).

377986993 is a wasteful number, since it uses less digits than its factorization.

377986993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12467.

The product of its digits is 15431472, while the sum is 61.

The square root of 377986993 is about 19441.8875884005. The cubic root of 377986993 is about 723.0343858452.

The spelling of 377986993 in words is "three hundred seventy-seven million, nine hundred eighty-six thousand, nine hundred ninety-three".