381858653 has 4 divisors (see below), whose sum is σ = 416573088. Its totient is φ = 347144220.

The previous prime is 381858649. The next prime is 381858667. The reversal of 381858653 is 356858183.

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: 356858183 = 11 ⋅32441653.

It is a cyclic number.

It is not a de Polignac number, because 381858653 - 2² = 381858649 is a prime.

It is a super-3 number, since 3×381858653³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 381858598 and 381858607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381858623) 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, 17357201 + ... + 17357222.

It is an arithmetic number, because the mean of its divisors is an integer number (104143272).

Almost surely, 2^381858653 is an apocalyptic number.

It is an amenable number.

381858653 is a deficient number, since it is larger than the sum of its proper divisors (34714435).

381858653 is a wasteful number, since it uses less digits than its factorization.

381858653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34714434.

The product of its digits is 691200, while the sum is 47.

The square root of 381858653 is about 19541.2039803079. The cubic root of 381858653 is about 725.4946465068.

The spelling of 381858653 in words is "three hundred eighty-one million, eight hundred fifty-eight thousand, six hundred fifty-three".