99145087427 has 4 divisors (see below), whose sum is σ = 99145730160. Its totient is φ = 99144444696.

The previous prime is 99145087423. The next prime is 99145087469. The reversal of 99145087427 is 72478054199.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 99145087427 - 2² = 99145087423 is a prime.

It is a deceptive number, since it divides R_99145087426.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99145087423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64274 + ... + 449912.

It is an arithmetic number, because the mean of its divisors is an integer number (24786432540).

Almost surely, 2^99145087427 is an apocalyptic number.

99145087427 is the 257093-rd pentagonal number.

99145087427 is a deficient number, since it is larger than the sum of its proper divisors (642733).

99145087427 is a wasteful number, since it uses less digits than its factorization.

99145087427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642732.

The product of its (nonzero) digits is 5080320, while the sum is 56.

The spelling of 99145087427 in words is "ninety-nine billion, one hundred forty-five million, eighty-seven thousand, four hundred twenty-seven".