1955995487 has 4 divisors (see below), whose sum is σ = 2003702736. Its totient is φ = 1908288240.

The previous prime is 1955995429. The next prime is 1955995501. The reversal of 1955995487 is 7845995591.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1955995487 - 2¹⁸ = 1955733343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1955995427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23853563 + ... + 23853644.

It is an arithmetic number, because the mean of its divisors is an integer number (500925684).

Almost surely, 2^1955995487 is an apocalyptic number.

1955995487 is a deficient number, since it is larger than the sum of its proper divisors (47707249).

1955995487 is an equidigital number, since it uses as much as digits as its factorization.

1955995487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47707248.

The product of its digits is 20412000, while the sum is 62.

The square root of 1955995487 is about 44226.6377537339. The cubic root of 1955995487 is about 1250.6120708065.

The spelling of 1955995487 in words is "one billion, nine hundred fifty-five million, nine hundred ninety-five thousand, four hundred eighty-seven".