61751387 has 4 divisors (see below), whose sum is σ = 65001480. Its totient is φ = 58501296.

The previous prime is 61751369. The next prime is 61751401. The reversal of 61751387 is 78315716.

61751387 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 is a cyclic number.

It is not a de Polignac number, because 61751387 - 2¹⁰ = 61750363 is a prime.

It is a super-3 number, since 3×61751387³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61751387.

It is not an unprimeable number, because it can be changed into a prime (61751317) 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 3 ways as a sum of consecutive naturals, for example, 1625018 + ... + 1625055.

It is an arithmetic number, because the mean of its divisors is an integer number (16250370).

Almost surely, 2^61751387 is an apocalyptic number.

61751387 is a deficient number, since it is larger than the sum of its proper divisors (3250093).

61751387 is a wasteful number, since it uses less digits than its factorization.

61751387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3250092.

The product of its digits is 35280, while the sum is 38.

The square root of 61751387 is about 7858.2050749519. The cubic root of 61751387 is about 395.2594289975.

The spelling of 61751387 in words is "sixty-one million, seven hundred fifty-one thousand, three hundred eighty-seven".