61487399 has 2 divisors, whose sum is σ = 61487400. Its totient is φ = 61487398.

The previous prime is 61487333. The next prime is 61487411. The reversal of 61487399 is 99378416.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61487399 - 2¹⁶ = 61421863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61487999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30743699 + 30743700.

It is an arithmetic number, because the mean of its divisors is an integer number (30743700).

Almost surely, 2^61487399 is an apocalyptic number.

61487399 is a deficient number, since it is larger than the sum of its proper divisors (1).

61487399 is an equidigital number, since it uses as much as digits as its factorization.

61487399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 47.

The square root of 61487399 is about 7841.3901191052. The cubic root of 61487399 is about 394.6953780200.

The spelling of 61487399 in words is "sixty-one million, four hundred eighty-seven thousand, three hundred ninety-nine".