991268377 has 4 divisors (see below), whose sum is σ = 1081383696. Its totient is φ = 901153060.

The previous prime is 991268371. The next prime is 991268423. The reversal of 991268377 is 773862199.

991268377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 991268377 - 2¹¹ = 991266329 is a prime.

It is a super-2 number, since 2×991268377² = 1965225990480428258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (991268371) 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, 45057643 + ... + 45057664.

It is an arithmetic number, because the mean of its divisors is an integer number (270345924).

Almost surely, 2^991268377 is an apocalyptic number.

It is an amenable number.

991268377 is a deficient number, since it is larger than the sum of its proper divisors (90115319).

991268377 is a wasteful number, since it uses less digits than its factorization.

991268377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90115318.

The product of its digits is 1143072, while the sum is 52.

The square root of 991268377 is about 31484.4148270220. The cubic root of 991268377 is about 997.0809464171.

The spelling of 991268377 in words is "nine hundred ninety-one million, two hundred sixty-eight thousand, three hundred seventy-seven".