91977011 has 4 divisors (see below), whose sum is σ = 105116592. Its totient is φ = 78837432.

The previous prime is 91976993. The next prime is 91977013. The reversal of 91977011 is 11077919.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11077919 = 89 ⋅124471.

It is a cyclic number.

It is not a de Polignac number, because 91977011 - 2⁶ = 91976947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91977013) 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, 6569780 + ... + 6569793.

It is an arithmetic number, because the mean of its divisors is an integer number (26279148).

Almost surely, 2^91977011 is an apocalyptic number.

91977011 is a deficient number, since it is larger than the sum of its proper divisors (13139581).

91977011 is a wasteful number, since it uses less digits than its factorization.

91977011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13139580.

The product of its (nonzero) digits is 3969, while the sum is 35.

The square root of 91977011 is about 9590.4645872867. The cubic root of 91977011 is about 451.3981387617.

The spelling of 91977011 in words is "ninety-one million, nine hundred seventy-seven thousand, eleven".