39952949 has 4 divisors (see below), whose sum is σ = 40000320. Its totient is φ = 39905580.

The previous prime is 39952931. The next prime is 39952967. The reversal of 39952949 is 94925993.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94925993 = 181 ⋅524453.

It is an interprime number because it is at equal distance from previous prime (39952931) and next prime (39952967).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39952949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39952897 and 39952906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39952919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22397 + ... + 24114.

It is an arithmetic number, because the mean of its divisors is an integer number (10000080).

Almost surely, 2^39952949 is an apocalyptic number.

It is an amenable number.

39952949 is a deficient number, since it is larger than the sum of its proper divisors (47371).

39952949 is an equidigital number, since it uses as much as digits as its factorization.

39952949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47370.

The product of its digits is 787320, while the sum is 50.

The square root of 39952949 is about 6320.8345176883. The cubic root of 39952949 is about 341.8610432602.

The spelling of 39952949 in words is "thirty-nine million, nine hundred fifty-two thousand, nine hundred forty-nine".