291916 has 24 divisors (see below), whose sum is σ = 564480. Its totient is φ = 131472.

The previous prime is 291901. The next prime is 291923. The reversal of 291916 is 619192.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1665 + ... + 1831.

It is an arithmetic number, because the mean of its divisors is an integer number (23520).

2²⁹¹⁹¹⁶ is an apocalyptic number.

It is an amenable number.

291916 is a deficient number, since it is larger than the sum of its proper divisors (272564).

291916 is a wasteful number, since it uses less digits than its factorization.

291916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213 (or 211 counting only the distinct ones).

The product of its digits is 972, while the sum is 28.

The square root of 291916 is about 540.2925133666. The cubic root of 291916 is about 66.3365121131.

The spelling of 291916 in words is "two hundred ninety-one thousand, nine hundred sixteen".