61763987 has 2 divisors, whose sum is σ = 61763988. Its totient is φ = 61763986.

The previous prime is 61763981. The next prime is 61764013. The reversal of 61763987 is 78936716.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61763987 - 2⁴ = 61763971 is a prime.

It is not a weakly prime, because it can be changed into another prime (61763981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30881993 + 30881994.

It is an arithmetic number, because the mean of its divisors is an integer number (30881994).

Almost surely, 2^61763987 is an apocalyptic number.

61763987 is a deficient number, since it is larger than the sum of its proper divisors (1).

61763987 is an equidigital number, since it uses as much as digits as its factorization.

61763987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 47.

The square root of 61763987 is about 7859.0067438576. The cubic root of 61763987 is about 395.2863106075.

The spelling of 61763987 in words is "sixty-one million, seven hundred sixty-three thousand, nine hundred eighty-seven".