381874513 has 4 divisors (see below), whose sum is σ = 383874048. Its totient is φ = 379874980.

The previous prime is 381874511. The next prime is 381874531. The reversal of 381874513 is 315478183.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 315478183 = 8861 ⋅35603.

It is a cyclic number.

It is not a de Polignac number, because 381874513 - 2¹ = 381874511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381874511) 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, 999481 + ... + 999862.

It is an arithmetic number, because the mean of its divisors is an integer number (95968512).

Almost surely, 2^381874513 is an apocalyptic number.

It is an amenable number.

381874513 is a deficient number, since it is larger than the sum of its proper divisors (1999535).

381874513 is a wasteful number, since it uses less digits than its factorization.

381874513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999534.

The product of its digits is 80640, while the sum is 40.

The square root of 381874513 is about 19541.6097852761. The cubic root of 381874513 is about 725.5046905251.

The spelling of 381874513 in words is "three hundred eighty-one million, eight hundred seventy-four thousand, five hundred thirteen".