381158409 has 8 divisors (see below), whose sum is σ = 510393312. Its totient is φ = 253014560.

The previous prime is 381158399. The next prime is 381158419. The reversal of 381158409 is 904851183.

It is an interprime number because it is at equal distance from previous prime (381158399) and next prime (381158419).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 381158409 - 2¹² = 381154313 is a prime.

It is a super-2 number, since 2×381158409² = 290563465502822562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (381158419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271947 + ... + 273344.

It is an arithmetic number, because the mean of its divisors is an integer number (63799164).

Almost surely, 2^381158409 is an apocalyptic number.

It is an amenable number.

381158409 is a deficient number, since it is larger than the sum of its proper divisors (129234903).

381158409 is a wasteful number, since it uses less digits than its factorization.

381158409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545527.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 381158409 is about 19523.2786437115. The cubic root of 381158409 is about 725.0509097821.

The spelling of 381158409 in words is "three hundred eighty-one million, one hundred fifty-eight thousand, four hundred nine".