99978741 has 24 divisors (see below), whose sum is σ = 155561120. Its totient is φ = 61671456.

The previous prime is 99978737. The next prime is 99978743. The reversal of 99978741 is 14787999.

It is not a de Polignac number, because 99978741 - 2² = 99978737 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 (99978743) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 555 + ... + 14151.

Almost surely, 2^99978741 is an apocalyptic number.

It is an amenable number.

99978741 is a deficient number, since it is larger than the sum of its proper divisors (55582379).

99978741 is a wasteful number, since it uses less digits than its factorization.

99978741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13665 (or 13662 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 54.

The square root of 99978741 is about 9998.9369935009. The cubic root of 99978741 is about 464.1259891845.

The spelling of 99978741 in words is "ninety-nine million, nine hundred seventy-eight thousand, seven hundred forty-one".