45891971 has 4 divisors (see below), whose sum is σ = 45920712. Its totient is φ = 45863232.

The previous prime is 45891941. The next prime is 45891977. The reversal of 45891971 is 17919854.

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 45891971 - 2⁶ = 45891907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45891977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11825 + ... + 15218.

It is an arithmetic number, because the mean of its divisors is an integer number (11480178).

Almost surely, 2^45891971 is an apocalyptic number.

45891971 is a deficient number, since it is larger than the sum of its proper divisors (28741).

45891971 is a wasteful number, since it uses less digits than its factorization.

45891971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28740.

The product of its digits is 90720, while the sum is 44.

The square root of 45891971 is about 6774.3612983070. The cubic root of 45891971 is about 358.0240795056.

It can be divided in two parts, 458 and 91971, that added together give a palindrome (92429).

The spelling of 45891971 in words is "forty-five million, eight hundred ninety-one thousand, nine hundred seventy-one".