40134723 has 4 divisors (see below), whose sum is σ = 53512968. Its totient is φ = 26756480.

The previous prime is 40134719. The next prime is 40134749. The reversal of 40134723 is 32743104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40134723 - 2² = 40134719 is a prime.

It is a super-2 number, since 2×40134723² = 3221591980573458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40134693 and 40134702.

It is not an unprimeable number, because it can be changed into a prime (40134713) 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, 6689118 + ... + 6689123.

It is an arithmetic number, because the mean of its divisors is an integer number (13378242).

Almost surely, 2^40134723 is an apocalyptic number.

40134723 is a deficient number, since it is larger than the sum of its proper divisors (13378245).

40134723 is a wasteful number, since it uses less digits than its factorization.

40134723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13378244.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 40134723 is about 6335.1971555746. The cubic root of 40134723 is about 342.3787142260.

Adding to 40134723 its reverse (32743104), we get a palindrome (72877827).

The spelling of 40134723 in words is "forty million, one hundred thirty-four thousand, seven hundred twenty-three".