99997542 has 48 divisors (see below), whose sum is σ = 220557168. Its totient is φ = 32739840.

The previous prime is 99997531. The next prime is 99997543. The reversal of 99997542 is 24579999.

99997542 is a `hidden beast` number, since 9 + 9 + 9 + 97 + 542 = 666.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99997543) 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, 429058 + ... + 429290.

It is an arithmetic number, because the mean of its divisors is an integer number (4594941).

Almost surely, 2^99997542 is an apocalyptic number.

99997542 is an abundant number, since it is smaller than the sum of its proper divisors (120559626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99997542 is a wasteful number, since it uses less digits than its factorization.

99997542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565 (or 562 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 54.

The square root of 99997542 is about 9999.8770992448. The cubic root of 99997542 is about 464.1550803217.

The spelling of 99997542 in words is "ninety-nine million, nine hundred ninety-seven thousand, five hundred forty-two".