40134729 has 4 divisors (see below), whose sum is σ = 53512976. Its totient is φ = 26756484.

The previous prime is 40134719. The next prime is 40134749. The reversal of 40134729 is 92743104.

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 not a de Polignac number, because 40134729 - 2⁴ = 40134713 is a prime.

It is a super-2 number, since 2×40134729² = 3221592943806882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40134696 and 40134705.

It is not an unprimeable number, because it can be changed into a prime (40134709) 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, 6689119 + ... + 6689124.

It is an arithmetic number, because the mean of its divisors is an integer number (13378244).

Almost surely, 2^40134729 is an apocalyptic number.

It is an amenable number.

40134729 is a deficient number, since it is larger than the sum of its proper divisors (13378247).

40134729 is a wasteful number, since it uses less digits than its factorization.

40134729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13378246.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 40134729 is about 6335.1976291194. The cubic root of 40134729 is about 342.3787312874.

The spelling of 40134729 in words is "forty million, one hundred thirty-four thousand, seven hundred twenty-nine".