61770587 has 2 divisors, whose sum is σ = 61770588. Its totient is φ = 61770586.

The previous prime is 61770529. The next prime is 61770589. The reversal of 61770587 is 78507716.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61770587 - 2²⁴ = 44993371 is a prime.

Together with 61770589, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61770589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30885293 + 30885294.

It is an arithmetic number, because the mean of its divisors is an integer number (30885294).

Almost surely, 2^61770587 is an apocalyptic number.

61770587 is a deficient number, since it is larger than the sum of its proper divisors (1).

61770587 is an equidigital number, since it uses as much as digits as its factorization.

61770587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82320, while the sum is 41.

The square root of 61770587 is about 7859.4266330312. The cubic root of 61770587 is about 395.3003899918.

The spelling of 61770587 in words is "sixty-one million, seven hundred seventy thousand, five hundred eighty-seven".