690861727 has 2 divisors, whose sum is σ = 690861728. Its totient is φ = 690861726.

The previous prime is 690861713. The next prime is 690861761. The reversal of 690861727 is 727168096.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 690861727 - 2¹⁵ = 690828959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690561727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345430863 + 345430864.

It is an arithmetic number, because the mean of its divisors is an integer number (345430864).

Almost surely, 2^690861727 is an apocalyptic number.

690861727 is a deficient number, since it is larger than the sum of its proper divisors (1).

690861727 is an equidigital number, since it uses as much as digits as its factorization.

690861727 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 690861727 is about 26284.2486481923. The cubic root of 690861727 is about 884.0232990556.

It can be divided in two parts, 6908 and 61727, that added together give a triangular number (68635 = T₃₇₀).

The spelling of 690861727 in words is "six hundred ninety million, eight hundred sixty-one thousand, seven hundred twenty-seven".