61617487 has 2 divisors, whose sum is σ = 61617488. Its totient is φ = 61617486.

The previous prime is 61617467. The next prime is 61617499. The reversal of 61617487 is 78471616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61617487 - 2¹¹ = 61615439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61617427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30808743 + 30808744.

It is an arithmetic number, because the mean of its divisors is an integer number (30808744).

Almost surely, 2^61617487 is an apocalyptic number.

61617487 is a deficient number, since it is larger than the sum of its proper divisors (1).

61617487 is an equidigital number, since it uses as much as digits as its factorization.

61617487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 40.

The square root of 61617487 is about 7849.6806941429. The cubic root of 61617487 is about 394.9735323824.

The spelling of 61617487 in words is "sixty-one million, six hundred seventeen thousand, four hundred eighty-seven".