40191147 has 10 divisors (see below), whose sum is σ = 60038748. Its totient is φ = 26794044.

The previous prime is 40191133. The next prime is 40191161. The reversal of 40191147 is 74119104.

It is an interprime number because it is at equal distance from previous prime (40191133) and next prime (40191161).

It is not a de Polignac number, because 40191147 - 2¹² = 40187051 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 40191147.

It is not an unprimeable number, because it can be changed into a prime (40191647) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 248013 + ... + 248174.

Almost surely, 2^40191147 is an apocalyptic number.

40191147 is a deficient number, since it is larger than the sum of its proper divisors (19847601).

40191147 is an equidigital number, since it uses as much as digits as its factorization.

40191147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496199 (or 496190 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 40191147 is about 6339.6488073079. The cubic root of 40191147 is about 342.5390851732.

The spelling of 40191147 in words is "forty million, one hundred ninety-one thousand, one hundred forty-seven".