1864077697 has 2 divisors, whose sum is σ = 1864077698. Its totient is φ = 1864077696.

The previous prime is 1864077671. The next prime is 1864077713. The reversal of 1864077697 is 7967704681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1347697521 + 516380176 = 36711^2 + 22724^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1864077697 is a prime.

It is not a weakly prime, because it can be changed into another prime (1864077637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 932038848 + 932038849.

It is an arithmetic number, because the mean of its divisors is an integer number (932038849).

Almost surely, 2^1864077697 is an apocalyptic number.

It is an amenable number.

1864077697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1864077697 is an equidigital number, since it uses as much as digits as its factorization.

1864077697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3556224, while the sum is 55.

The square root of 1864077697 is about 43174.9660914748. The cubic root of 1864077697 is about 1230.7069980862.

The spelling of 1864077697 in words is "one billion, eight hundred sixty-four million, seventy-seven thousand, six hundred ninety-seven".