61487851 has 2 divisors, whose sum is σ = 61487852. Its totient is φ = 61487850.

The previous prime is 61487813. The next prime is 61487869. The reversal of 61487851 is 15878416.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61487851 - 2¹³ = 61479659 is a prime.

It is not a weakly prime, because it can be changed into another prime (61487551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30743925 + 30743926.

It is an arithmetic number, because the mean of its divisors is an integer number (30743926).

Almost surely, 2^61487851 is an apocalyptic number.

61487851 is a deficient number, since it is larger than the sum of its proper divisors (1).

61487851 is an equidigital number, since it uses as much as digits as its factorization.

61487851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 40.

The square root of 61487851 is about 7841.4189404724. The cubic root of 61487851 is about 394.6963451660.

The spelling of 61487851 in words is "sixty-one million, four hundred eighty-seven thousand, eight hundred fifty-one".