40153947 has 4 divisors (see below), whose sum is σ = 53538600. Its totient is φ = 26769296.

The previous prime is 40153943. The next prime is 40153957. The reversal of 40153947 is 74935104.

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 40153947 - 2² = 40153943 is a prime.

It is a super-2 number, since 2×40153947² = 3224678919357618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40153943) 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, 6692322 + ... + 6692327.

It is an arithmetic number, because the mean of its divisors is an integer number (13384650).

Almost surely, 2^40153947 is an apocalyptic number.

40153947 is a deficient number, since it is larger than the sum of its proper divisors (13384653).

40153947 is a wasteful number, since it uses less digits than its factorization.

40153947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13384652.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 40153947 is about 6336.7142116400. The cubic root of 40153947 is about 342.4333704547.

The spelling of 40153947 in words is "forty million, one hundred fifty-three thousand, nine hundred forty-seven".