91844961 has 32 divisors (see below), whose sum is σ = 137168640. Its totient is φ = 54297600.

The previous prime is 91844959. The next prime is 91844981. The reversal of 91844961 is 16944819.

It is not a de Polignac number, because 91844961 - 2¹ = 91844959 is a prime.

It is a super-2 number, since 2×91844961² = 16870993722183042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91844981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113125 + ... + 113933.

It is an arithmetic number, because the mean of its divisors is an integer number (4286520).

Almost surely, 2^91844961 is an apocalyptic number.

It is an amenable number.

91844961 is a deficient number, since it is larger than the sum of its proper divisors (45323679).

91844961 is a wasteful number, since it uses less digits than its factorization.

91844961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937.

The product of its digits is 62208, while the sum is 42.

The square root of 91844961 is about 9583.5776722475. The cubic root of 91844961 is about 451.1820134784.

The spelling of 91844961 in words is "ninety-one million, eight hundred forty-four thousand, nine hundred sixty-one".