378591131 has 4 divisors (see below), whose sum is σ = 398517000. Its totient is φ = 358665264.

The previous prime is 378591121. The next prime is 378591133. The reversal of 378591131 is 131195873.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131195873 = 269 ⋅487717.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378591131 is a prime.

It is a super-2 number, since 2×378591131² = 286662488943718322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378591133) 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, 9962906 + ... + 9962943.

It is an arithmetic number, because the mean of its divisors is an integer number (99629250).

Almost surely, 2^378591131 is an apocalyptic number.

378591131 is a deficient number, since it is larger than the sum of its proper divisors (19925869).

378591131 is a wasteful number, since it uses less digits than its factorization.

378591131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19925868.

The product of its digits is 22680, while the sum is 38.

The square root of 378591131 is about 19457.4184053281. The cubic root of 378591131 is about 723.4193903053.

The spelling of 378591131 in words is "three hundred seventy-eight million, five hundred ninety-one thousand, one hundred thirty-one".