37720413 has 6 divisors (see below), whose sum is σ = 54485054. Its totient is φ = 25146936.

The previous prime is 37720373. The next prime is 37720439. The reversal of 37720413 is 31402773.

It can be written as a sum of positive squares in only one way, i.e., 37675044 + 45369 = 6138^2 + 213^2 .

It is not a de Polignac number, because 37720413 - 2⁸ = 37720157 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 (37720493) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2095570 + ... + 2095587.

Almost surely, 2^37720413 is an apocalyptic number.

It is an amenable number.

37720413 is a deficient number, since it is larger than the sum of its proper divisors (16764641).

37720413 is a wasteful number, since it uses less digits than its factorization.

37720413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4191163 (or 4191160 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 37720413 is about 6141.6946358477. The cubic root of 37720413 is about 335.3709798315.

The spelling of 37720413 in words is "thirty-seven million, seven hundred twenty thousand, four hundred thirteen".