61761587 has 2 divisors, whose sum is σ = 61761588. Its totient is φ = 61761586.

The previous prime is 61761563. The next prime is 61761607. The reversal of 61761587 is 78516716.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61761587 - 2⁶ = 61761523 is a prime.

It is not a weakly prime, because it can be changed into another prime (61731587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30880793 + 30880794.

It is an arithmetic number, because the mean of its divisors is an integer number (30880794).

Almost surely, 2^61761587 is an apocalyptic number.

61761587 is a deficient number, since it is larger than the sum of its proper divisors (1).

61761587 is an equidigital number, since it uses as much as digits as its factorization.

61761587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 41.

The square root of 61761587 is about 7858.8540513233. The cubic root of 61761587 is about 395.2811905827.

The spelling of 61761587 in words is "sixty-one million, seven hundred sixty-one thousand, five hundred eighty-seven".