91927669 has 2 divisors, whose sum is σ = 91927670. Its totient is φ = 91927668.

The previous prime is 91927631. The next prime is 91927673. The reversal of 91927669 is 96672919.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88078225 + 3849444 = 9385^2 + 1962^2 .

It is a cyclic number.

It is not a de Polignac number, because 91927669 - 2⁷ = 91927541 is a prime.

It is a super-2 number, since 2×91927669² = 16901392655547122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91927609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45963834 + 45963835.

It is an arithmetic number, because the mean of its divisors is an integer number (45963835).

Almost surely, 2^91927669 is an apocalyptic number.

It is an amenable number.

91927669 is a deficient number, since it is larger than the sum of its proper divisors (1).

91927669 is an equidigital number, since it uses as much as digits as its factorization.

91927669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 49.

The square root of 91927669 is about 9587.8917912125. The cubic root of 91927669 is about 451.3174052873.

It can be divided in two parts, 9192 and 7669, that added together give a palindrome (16861).

The spelling of 91927669 in words is "ninety-one million, nine hundred twenty-seven thousand, six hundred sixty-nine".