377779991 has 8 divisors (see below), whose sum is σ = 398636640. Its totient is φ = 357292672.

The previous prime is 377779979. The next prime is 377780017. The reversal of 377779991 is 199977773.

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

It is not a de Polignac number, because 377779991 - 2²² = 373585687 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 377779991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (377779921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90230 + ... + 94323.

It is an arithmetic number, because the mean of its divisors is an integer number (49829580).

Almost surely, 2^377779991 is an apocalyptic number.

377779991 is a deficient number, since it is larger than the sum of its proper divisors (20856649).

377779991 is a wasteful number, since it uses less digits than its factorization.

377779991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184665.

The product of its digits is 5250987, while the sum is 59.

The square root of 377779991 is about 19436.5632507396. The cubic root of 377779991 is about 722.9023734595.

The spelling of 377779991 in words is "three hundred seventy-seven million, seven hundred seventy-nine thousand, nine hundred ninety-one".