45991961 has 4 divisors (see below), whose sum is σ = 46098612. Its totient is φ = 45885312.

The previous prime is 45991943. The next prime is 45991963. The reversal of 45991961 is 16919954.

45991961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5593225 + 40398736 = 2365^2 + 6356^2 .

It is a cyclic number.

It is not a de Polignac number, because 45991961 - 2¹⁰ = 45990937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45991963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52676 + ... + 53541.

It is an arithmetic number, because the mean of its divisors is an integer number (11524653).

Almost surely, 2^45991961 is an apocalyptic number.

It is an amenable number.

45991961 is a deficient number, since it is larger than the sum of its proper divisors (106651).

45991961 is a wasteful number, since it uses less digits than its factorization.

45991961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106650.

The product of its digits is 87480, while the sum is 44.

The square root of 45991961 is about 6781.7373142875. The cubic root of 45991961 is about 358.2839133335.

The spelling of 45991961 in words is "forty-five million, nine hundred ninety-one thousand, nine hundred sixty-one".