37969985 has 4 divisors (see below), whose sum is σ = 45563988. Its totient is φ = 30375984.

The previous prime is 37969949. The next prime is 37970021. The reversal of 37969985 is 58996973.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58996973 = 7 ⋅8428139.

It is an interprime number because it is at equal distance from previous prime (37969949) and next prime (37970021).

It can be written as a sum of positive squares in 2 ways, for example, as 7311616 + 30658369 = 2704^2 + 5537^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37969985 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 37969985.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3796994 + ... + 3797003.

It is an arithmetic number, because the mean of its divisors is an integer number (11390997).

Almost surely, 2^37969985 is an apocalyptic number.

It is an amenable number.

37969985 is a deficient number, since it is larger than the sum of its proper divisors (7594003).

37969985 is an equidigital number, since it uses as much as digits as its factorization.

37969985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7594002.

The product of its digits is 3674160, while the sum is 56.

The square root of 37969985 is about 6161.9789840602. The cubic root of 37969985 is about 336.1090000905.

The spelling of 37969985 in words is "thirty-seven million, nine hundred sixty-nine thousand, nine hundred eighty-five".