61988125 has 10 divisors (see below), whose sum is σ = 77461142. Its totient is φ = 49590000.

The previous prime is 61988123. The next prime is 61988131. The reversal of 61988125 is 52188916.

It can be written as a sum of positive squares in 5 ways, for example, as 27154521 + 34833604 = 5211^2 + 5902^2 .

It is not a de Polignac number, because 61988125 - 2¹ = 61988123 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 (61988123) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 48966 + ... + 50215.

Almost surely, 2^61988125 is an apocalyptic number.

It is an amenable number.

61988125 is a deficient number, since it is larger than the sum of its proper divisors (15473017).

61988125 is an frugal number, since it uses more digits than its factorization.

61988125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99201 (or 99186 counting only the distinct ones).

The product of its digits is 34560, while the sum is 40.

The square root of 61988125 is about 7873.2537746474. The cubic root of 61988125 is about 395.7638905574.

The spelling of 61988125 in words is "sixty-one million, nine hundred eighty-eight thousand, one hundred twenty-five".