61887499 has 2 divisors, whose sum is σ = 61887500. Its totient is φ = 61887498.

The previous prime is 61887493. The next prime is 61887509. The reversal of 61887499 is 99478816.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61887499 - 2⁵ = 61887467 is a prime.

It is not a weakly prime, because it can be changed into another prime (61887493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30943749 + 30943750.

It is an arithmetic number, because the mean of its divisors is an integer number (30943750).

Almost surely, 2^61887499 is an apocalyptic number.

61887499 is a deficient number, since it is larger than the sum of its proper divisors (1).

61887499 is an equidigital number, since it uses as much as digits as its factorization.

61887499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 52.

The square root of 61887499 is about 7866.8608097512. The cubic root of 61887499 is about 395.5496252945.

The spelling of 61887499 in words is "sixty-one million, eight hundred eighty-seven thousand, four hundred ninety-nine".