786990641 has 2 divisors, whose sum is σ = 786990642. Its totient is φ = 786990640.

The previous prime is 786990623. The next prime is 786990649. The reversal of 786990641 is 146099687.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 634838416 + 152152225 = 25196^2 + 12335^2 .

It is a cyclic number.

It is not a de Polignac number, because 786990641 - 2⁶ = 786990577 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 786990641.

It is not a weakly prime, because it can be changed into another prime (786990649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 393495320 + 393495321.

It is an arithmetic number, because the mean of its divisors is an integer number (393495321).

Almost surely, 2^786990641 is an apocalyptic number.

It is an amenable number.

786990641 is a deficient number, since it is larger than the sum of its proper divisors (1).

786990641 is an equidigital number, since it uses as much as digits as its factorization.

786990641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 786990641 is about 28053.3534715549. The cubic root of 786990641 is about 923.2582333088.

The spelling of 786990641 in words is "seven hundred eighty-six million, nine hundred ninety thousand, six hundred forty-one".