99391440677 has 2 divisors, whose sum is σ = 99391440678. Its totient is φ = 99391440676.

The previous prime is 99391440583. The next prime is 99391440691. The reversal of 99391440677 is 77604419399.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85606567396 + 13784873281 = 292586^2 + 117409^2 .

It is a cyclic number.

It is not a de Polignac number, because 99391440677 - 2²⁴ = 99374663461 is a prime.

It is a super-2 number, since 2×99391440677² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99391440377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49695720338 + 49695720339.

It is an arithmetic number, because the mean of its divisors is an integer number (49695720339).

Almost surely, 2^99391440677 is an apocalyptic number.

It is an amenable number.

99391440677 is a deficient number, since it is larger than the sum of its proper divisors (1).

99391440677 is an equidigital number, since it uses as much as digits as its factorization.

99391440677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10287648, while the sum is 59.

The spelling of 99391440677 in words is "ninety-nine billion, three hundred ninety-one million, four hundred forty thousand, six hundred seventy-seven".