99977653 has 2 divisors, whose sum is σ = 99977654. Its totient is φ = 99977652.

The previous prime is 99977651. The next prime is 99977693. The reversal of 99977653 is 35677999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61748164 + 38229489 = 7858^2 + 6183^2 .

It is a cyclic number.

It is not a de Polignac number, because 99977653 - 2¹ = 99977651 is a prime.

Together with 99977651, it forms a pair of twin primes.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 99977594 and 99977603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99977651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49988826 + 49988827.

It is an arithmetic number, because the mean of its divisors is an integer number (49988827).

Almost surely, 2^99977653 is an apocalyptic number.

It is an amenable number.

99977653 is a deficient number, since it is larger than the sum of its proper divisors (1).

99977653 is an equidigital number, since it uses as much as digits as its factorization.

99977653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3214890, while the sum is 55.

The square root of 99977653 is about 9998.8825875695. The cubic root of 99977653 is about 464.1243055902.

The spelling of 99977653 in words is "ninety-nine million, nine hundred seventy-seven thousand, six hundred fifty-three".