619668887 has 6 divisors (see below), whose sum is σ = 658264488. Its totient is φ = 583217504.

The previous prime is 619668877. The next prime is 619668893. The reversal of 619668887 is 788866916.

It is not a de Polignac number, because 619668887 - 2⁸ = 619668631 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 (619668877) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1071803 + ... + 1072380.

It is an arithmetic number, because the mean of its divisors is an integer number (109710748).

Almost surely, 2^619668887 is an apocalyptic number.

619668887 is a deficient number, since it is larger than the sum of its proper divisors (38595601).

619668887 is a wasteful number, since it uses less digits than its factorization.

619668887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144217 (or 2144200 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 59.

The square root of 619668887 is about 24893.1493989812. The cubic root of 619668887 is about 852.5500752313.

The spelling of 619668887 in words is "six hundred nineteen million, six hundred sixty-eight thousand, eight hundred eighty-seven".