53987077 has 4 divisors (see below), whose sum is σ = 54726700. Its totient is φ = 53247456.

The previous prime is 53987071. The next prime is 53987083. The reversal of 53987077 is 77078935.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (53987071) and next prime (53987083).

It can be written as a sum of positive squares in 2 ways, for example, as 38862756 + 15124321 = 6234^2 + 3889^2 .

It is a cyclic number.

It is not a de Polignac number, because 53987077 - 2³ = 53987069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53987071) 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, 369702 + ... + 369847.

It is an arithmetic number, because the mean of its divisors is an integer number (13681675).

Almost surely, 2^53987077 is an apocalyptic number.

It is an amenable number.

53987077 is a deficient number, since it is larger than the sum of its proper divisors (739623).

53987077 is an equidigital number, since it uses as much as digits as its factorization.

53987077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739622.

The product of its (nonzero) digits is 370440, while the sum is 46.

The square root of 53987077 is about 7347.5898769597. The cubic root of 53987077 is about 377.9461607856.

It can be divided in two parts, 539 and 87077, that added together give a square (87616 = 296²).

The spelling of 53987077 in words is "fifty-three million, nine hundred eighty-seven thousand, seventy-seven".