91942061 has 4 divisors (see below), whose sum is σ = 92473692. Its totient is φ = 91410432.

The previous prime is 91942057. The next prime is 91942087. The reversal of 91942061 is 16024919.

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 89661961 + 2280100 = 9469^2 + 1510^2 .

It is not a de Polignac number, because 91942061 - 2² = 91942057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91942021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265556 + ... + 265901.

It is an arithmetic number, because the mean of its divisors is an integer number (23118423).

Almost surely, 2^91942061 is an apocalyptic number.

It is an amenable number.

91942061 is a deficient number, since it is larger than the sum of its proper divisors (531631).

91942061 is a wasteful number, since it uses less digits than its factorization.

91942061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531630.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 91942061 is about 9588.6422917950. The cubic root of 91942061 is about 451.3409564888.

The spelling of 91942061 in words is "ninety-one million, nine hundred forty-two thousand, sixty-one".