4761991 has 4 divisors (see below), whose sum is σ = 5128312. Its totient is φ = 4395672.

The previous prime is 4761979. The next prime is 4762013. The reversal of 4761991 is 1991674.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4761991 - 2¹⁵ = 4729223 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 4761991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4761971) 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, 183141 + ... + 183166.

It is an arithmetic number, because the mean of its divisors is an integer number (1282078).

Almost surely, 2^4761991 is an apocalyptic number.

4761991 is a deficient number, since it is larger than the sum of its proper divisors (366321).

4761991 is a wasteful number, since it uses less digits than its factorization.

4761991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366320.

The product of its digits is 13608, while the sum is 37.

The square root of 4761991 is about 2182.1986619004. The cubic root of 4761991 is about 168.2401021712.

It can be divided in two parts, 4 and 761991, that added together give a triangular number (761995 = T₁₂₃₄).

The spelling of 4761991 in words is "four million, seven hundred sixty-one thousand, nine hundred ninety-one".