608451381 has 6 divisors (see below), whose sum is σ = 878874230. Its totient is φ = 405634248.

The previous prime is 608451379. The next prime is 608451391. The reversal of 608451381 is 183154806.

608451381 is a `hidden beast` number, since 60 + 8 + 4 + 513 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 597362481 + 11088900 = 24441^2 + 3330^2 .

It is not a de Polignac number, because 608451381 - 2¹ = 608451379 is a prime.

It is a super-2 number, since 2×608451381² = 740426166081614322, 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 (608451391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33802846 + ... + 33802863.

Almost surely, 2^608451381 is an apocalyptic number.

It is an amenable number.

608451381 is a deficient number, since it is larger than the sum of its proper divisors (270422849).

608451381 is a wasteful number, since it uses less digits than its factorization.

608451381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67605715 (or 67605712 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 608451381 is about 24666.8072721218. The cubic root of 608451381 is about 847.3743108564.

It can be divided in two parts, 60845 and 1381, that added together give a palindrome (62226).

The spelling of 608451381 in words is "six hundred eight million, four hundred fifty-one thousand, three hundred eighty-one".