2991755 has 8 divisors (see below), whose sum is σ = 3866352. Its totient is φ = 2209248.

The previous prime is 2991743. The next prime is 2991757. The reversal of 2991755 is 5571992.

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

It is a cyclic number.

It is not a de Polignac number, because 2991755 - 2¹² = 2987659 is a prime.

It is a super-3 number, since 3×2991755³ = 80333988779189081625, which contains 333 as substring.

It is a Duffinian number.

It is a zygodrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (2991757) 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, 22949 + ... + 23078.

It is an arithmetic number, because the mean of its divisors is an integer number (483294).

2^2991755 is an apocalyptic number.

2991755 is a deficient number, since it is larger than the sum of its proper divisors (874597).

2991755 is a wasteful number, since it uses less digits than its factorization.

2991755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46045.

The product of its digits is 28350, while the sum is 38.

The square root of 2991755 is about 1729.6690434878. The cubic root of 2991755 is about 144.0927097178.

The spelling of 2991755 in words is "two million, nine hundred ninety-one thousand, seven hundred fifty-five".