91023677 has 2 divisors, whose sum is σ = 91023678. Its totient is φ = 91023676.

The previous prime is 91023659. The next prime is 91023683. The reversal of 91023677 is 77632019.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50395801 + 40627876 = 7099^2 + 6374^2 .

It is an emirp because it is prime and its reverse (77632019) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91023677 - 2¹⁶ = 90958141 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91023617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45511838 + 45511839.

It is an arithmetic number, because the mean of its divisors is an integer number (45511839).

Almost surely, 2^91023677 is an apocalyptic number.

It is an amenable number.

91023677 is a deficient number, since it is larger than the sum of its proper divisors (1).

91023677 is an equidigital number, since it uses as much as digits as its factorization.

91023677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 91023677 is about 9540.6329454602. The cubic root of 91023677 is about 449.8331513131.

The spelling of 91023677 in words is "ninety-one million, twenty-three thousand, six hundred seventy-seven".