623032381 has 4 divisors (see below), whose sum is σ = 639871132. Its totient is φ = 606193632.

The previous prime is 623032373. The next prime is 623032429. The reversal of 623032381 is 183230326.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 587820025 + 35212356 = 24245^2 + 5934^2 .

It is a cyclic number.

It is not a de Polignac number, because 623032381 - 2³ = 623032373 is a prime.

It is a super-2 number, since 2×623032381² = 776338695549058322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623032301) 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, 8419320 + ... + 8419393.

It is an arithmetic number, because the mean of its divisors is an integer number (159967783).

Almost surely, 2^623032381 is an apocalyptic number.

It is an amenable number.

623032381 is a deficient number, since it is larger than the sum of its proper divisors (16838751).

623032381 is a wasteful number, since it uses less digits than its factorization.

623032381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16838750.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 623032381 is about 24960.6165989544. The cubic root of 623032381 is about 854.0898085034.

The spelling of 623032381 in words is "six hundred twenty-three million, thirty-two thousand, three hundred eighty-one".