128783651 has 2 divisors, whose sum is σ = 128783652. Its totient is φ = 128783650.

The previous prime is 128783597. The next prime is 128783657. The reversal of 128783651 is 156387821.

It is a strong prime.

It is an emirp because it is prime and its reverse (156387821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128783651 - 2¹⁸ = 128521507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128783599 and 128783608.

It is not a weakly prime, because it can be changed into another prime (128783657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64391825 + 64391826.

It is an arithmetic number, because the mean of its divisors is an integer number (64391826).

Almost surely, 2^128783651 is an apocalyptic number.

128783651 is a deficient number, since it is larger than the sum of its proper divisors (1).

128783651 is an equidigital number, since it uses as much as digits as its factorization.

128783651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 41.

The square root of 128783651 is about 11348.2884612615. The cubic root of 128783651 is about 504.9948056846.

The spelling of 128783651 in words is "one hundred twenty-eight million, seven hundred eighty-three thousand, six hundred fifty-one".