654401386 has 4 divisors (see below), whose sum is σ = 981602082. Its totient is φ = 327200692.

The previous prime is 654401381. The next prime is 654401389. The reversal of 654401386 is 683104456.

It is a happy number.

654401386 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 603635761 + 50765625 = 24569^2 + 7125^2 .

It is not an unprimeable number, because it can be changed into a prime (654401381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163600345 + ... + 163600348.

Almost surely, 2^654401386 is an apocalyptic number.

654401386 is a deficient number, since it is larger than the sum of its proper divisors (327200696).

654401386 is a wasteful number, since it uses less digits than its factorization.

654401386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327200695.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 654401386 is about 25581.2702186580. The cubic root of 654401386 is about 868.1899152282.

The spelling of 654401386 in words is "six hundred fifty-four million, four hundred one thousand, three hundred eighty-six".