39761945 has 4 divisors (see below), whose sum is σ = 47714340. Its totient is φ = 31809552.

The previous prime is 39761941. The next prime is 39761951. The reversal of 39761945 is 54916793.

39761945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30294016 + 9467929 = 5504^2 + 3077^2 .

It is a cyclic number.

It is not a de Polignac number, because 39761945 - 2² = 39761941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39761896 and 39761905.

It is not an unprimeable number, because it can be changed into a prime (39761941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3976190 + ... + 3976199.

It is an arithmetic number, because the mean of its divisors is an integer number (11928585).

Almost surely, 2^39761945 is an apocalyptic number.

It is an amenable number.

39761945 is a deficient number, since it is larger than the sum of its proper divisors (7952395).

39761945 is an equidigital number, since it uses as much as digits as its factorization.

39761945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7952394.

The product of its digits is 204120, while the sum is 44.

The square root of 39761945 is about 6305.7073354224. The cubic root of 39761945 is about 341.3153917631.

The spelling of 39761945 in words is "thirty-nine million, seven hundred sixty-one thousand, nine hundred forty-five".