1987672823 has 2 divisors, whose sum is σ = 1987672824. Its totient is φ = 1987672822.

The previous prime is 1987672801. The next prime is 1987672837. The reversal of 1987672823 is 3282767891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1987672823 - 2⁸ = 1987672567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1987671823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993836411 + 993836412.

It is an arithmetic number, because the mean of its divisors is an integer number (993836412).

Almost surely, 2^1987672823 is an apocalyptic number.

1987672823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1987672823 is an equidigital number, since it uses as much as digits as its factorization.

1987672823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 53.

The square root of 1987672823 is about 44583.3244947032. The cubic root of 1987672823 is about 1257.3271684022.

The spelling of 1987672823 in words is "one billion, nine hundred eighty-seven million, six hundred seventy-two thousand, eight hundred twenty-three".