99977377999 has 2 divisors, whose sum is σ = 99977378000. Its totient is φ = 99977377998.

The previous prime is 99977377993. The next prime is 99977378077.

99977377999 is nontrivially palindromic in base 10.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 99977377999 - 2¹¹ = 99977375951 is a prime.

It is a super-2 number, since 2×99977377999² (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 (99977377993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49988688999 + 49988689000.

It is an arithmetic number, because the mean of its divisors is an integer number (49988689000).

Almost surely, 2^99977377999 is an apocalyptic number.

99977377999 is a deficient number, since it is larger than the sum of its proper divisors (1).

99977377999 is an equidigital number, since it uses as much as digits as its factorization.

99977377999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3827969523, while the sum is 85.

The spelling of 99977377999 in words is "ninety-nine billion, nine hundred seventy-seven million, three hundred seventy-seven thousand, nine hundred ninety-nine".