99401729 has 4 divisors (see below), whose sum is σ = 113601984. Its totient is φ = 85201476.

The previous prime is 99401707. The next prime is 99401741. The reversal of 99401729 is 92710499.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99401729 - 2²⁴ = 82624513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99401759) 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, 7100117 + ... + 7100130.

It is an arithmetic number, because the mean of its divisors is an integer number (28400496).

It is a Proth number, since it is equal to 6067 ⋅ 2¹⁴ + 1 and 6067 < 2¹⁴.

Almost surely, 2^99401729 is an apocalyptic number.

It is an amenable number.

99401729 is a deficient number, since it is larger than the sum of its proper divisors (14200255).

99401729 is a wasteful number, since it uses less digits than its factorization.

99401729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14200254.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 99401729 is about 9970.0415746375. The cubic root of 99401729 is about 463.2313885864.

The spelling of 99401729 in words is "ninety-nine million, four hundred one thousand, seven hundred twenty-nine".