91950061 has 16 divisors (see below), whose sum is σ = 108822528. Its totient is φ = 76028400.

The previous prime is 91950049. The next prime is 91950073. The reversal of 91950061 is 16005919.

It is an interprime number because it is at equal distance from previous prime (91950049) and next prime (91950073).

It is not a de Polignac number, because 91950061 - 2⁷ = 91949933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91950011) 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 15 ways as a sum of consecutive naturals, for example, 106116 + ... + 106978.

It is an arithmetic number, because the mean of its divisors is an integer number (6801408).

Almost surely, 2^91950061 is an apocalyptic number.

It is an amenable number.

91950061 is a deficient number, since it is larger than the sum of its proper divisors (16872467).

91950061 is a wasteful number, since it uses less digits than its factorization.

91950061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 91950061 is about 9589.0594429277. The cubic root of 91950061 is about 451.3540466998.

The spelling of 91950061 in words is "ninety-one million, nine hundred fifty thousand, sixty-one".