11729997 has 12 divisors (see below), whose sum is σ = 17490304. Its totient is φ = 7567560.

The previous prime is 11729989. The next prime is 11730001. The reversal of 11729997 is 79992711.

It is not a de Polignac number, because 11729997 - 2³ = 11729989 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 (11729917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20743 + ... + 21300.

Almost surely, 2^11729997 is an apocalyptic number.

It is an amenable number.

11729997 is a deficient number, since it is larger than the sum of its proper divisors (5760307).

11729997 is a wasteful number, since it uses less digits than its factorization.

11729997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42080 (or 42077 counting only the distinct ones).

The product of its digits is 71442, while the sum is 45.

The square root of 11729997 is about 3424.9083199408. The cubic root of 11729997 is about 227.2127163108.

The spelling of 11729997 in words is "eleven million, seven hundred twenty-nine thousand, nine hundred ninety-seven".