914377991 has 4 divisors (see below), whose sum is σ = 915274584. Its totient is φ = 913481400.

The previous prime is 914377957. The next prime is 914377999. The reversal of 914377991 is 199773419.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199773419 = 641 ⋅311659.

It is a cyclic number.

It is not a de Polignac number, because 914377991 - 2¹⁴ = 914361607 is a prime.

It is a super-2 number, since 2×914377991² = 1672174220850392162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (914377999) 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, 446765 + ... + 448806.

It is an arithmetic number, because the mean of its divisors is an integer number (228818646).

Almost surely, 2^914377991 is an apocalyptic number.

914377991 is a deficient number, since it is larger than the sum of its proper divisors (896593).

914377991 is a wasteful number, since it uses less digits than its factorization.

914377991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896592.

The product of its digits is 428652, while the sum is 50.

The square root of 914377991 is about 30238.6836849754. The cubic root of 914377991 is about 970.6036526680.

The spelling of 914377991 in words is "nine hundred fourteen million, three hundred seventy-seven thousand, nine hundred ninety-one".