4361991 has 4 divisors (see below), whose sum is σ = 5815992. Its totient is φ = 2907992.

The previous prime is 4361983. The next prime is 4362011. The reversal of 4361991 is 1991634.

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 4361991 - 2³ = 4361983 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4361941) 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, 726996 + ... + 727001.

It is an arithmetic number, because the mean of its divisors is an integer number (1453998).

Almost surely, 2^4361991 is an apocalyptic number.

4361991 is a deficient number, since it is larger than the sum of its proper divisors (1454001).

4361991 is a wasteful number, since it uses less digits than its factorization.

4361991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454000.

The product of its digits is 5832, while the sum is 33.

The square root of 4361991 is about 2088.5380053999. The cubic root of 4361991 is about 163.3910467527.

The spelling of 4361991 in words is "four million, three hundred sixty-one thousand, nine hundred ninety-one".