40517949 has 4 divisors (see below), whose sum is σ = 54023936. Its totient is φ = 27011964.

The previous prime is 40517947. The next prime is 40517951. The reversal of 40517949 is 94971504.

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 an interprime number because it is at equal distance from previous prime (40517947) and next prime (40517951).

It is not a de Polignac number, because 40517949 - 2¹ = 40517947 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 (40517941) 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, 6752989 + ... + 6752994.

It is an arithmetic number, because the mean of its divisors is an integer number (13505984).

Almost surely, 2^40517949 is an apocalyptic number.

It is an amenable number.

40517949 is a deficient number, since it is larger than the sum of its proper divisors (13505987).

40517949 is a wasteful number, since it uses less digits than its factorization.

40517949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13505986.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 40517949 is about 6365.3710810918. The cubic root of 40517949 is about 343.4649973126.

The spelling of 40517949 in words is "forty million, five hundred seventeen thousand, nine hundred forty-nine".