99673487 has 4 divisors (see below), whose sum is σ = 104919480. Its totient is φ = 94427496.

The previous prime is 99673481. The next prime is 99673507. The reversal of 99673487 is 78437699.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78437699 = 571 ⋅137369.

It is a cyclic number.

It is not a de Polignac number, because 99673487 - 2¹² = 99669391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99673481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2622968 + ... + 2623005.

It is an arithmetic number, because the mean of its divisors is an integer number (26229870).

Almost surely, 2^99673487 is an apocalyptic number.

99673487 is a deficient number, since it is larger than the sum of its proper divisors (5245993).

99673487 is a wasteful number, since it uses less digits than its factorization.

99673487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5245992.

The product of its digits is 2286144, while the sum is 53.

The square root of 99673487 is about 9983.6610018570. The cubic root of 99673487 is about 463.6531528377.

The spelling of 99673487 in words is "ninety-nine million, six hundred seventy-three thousand, four hundred eighty-seven".