378682537 has 4 divisors (see below), whose sum is σ = 378722260. Its totient is φ = 378642816.

The previous prime is 378682529. The next prime is 378682541. The reversal of 378682537 is 735286873.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 214944921 + 163737616 = 14661^2 + 12796^2 .

It is a 3-Lehmer number, since φ(378682537) divides (378682537-1)³.

It is a cyclic number.

It is not a de Polignac number, because 378682537 - 2³ = 378682529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378685537) 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, 3973 + ... + 27805.

It is an arithmetic number, because the mean of its divisors is an integer number (94680565).

It is a Poulet number, since it divides 2^378682536-1.

Almost surely, 2^378682537 is an apocalyptic number.

378682537 is the 15889-th pentagonal number.

It is an amenable number.

378682537 is a deficient number, since it is larger than the sum of its proper divisors (39723).

378682537 is a wasteful number, since it uses less digits than its factorization.

378682537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39722.

The product of its digits is 1693440, while the sum is 49.

The square root of 378682537 is about 19459.7671363251. The cubic root of 378682537 is about 723.4776057488.

The spelling of 378682537 in words is "three hundred seventy-eight million, six hundred eighty-two thousand, five hundred thirty-seven".