1864051697 has 2 divisors, whose sum is σ = 1864051698. Its totient is φ = 1864051696.

The previous prime is 1864051633. The next prime is 1864051699. The reversal of 1864051697 is 7961504681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1409551936 + 454499761 = 37544^2 + 21319^2 .

It is a cyclic number.

It is not a de Polignac number, because 1864051697 - 2⁶ = 1864051633 is a prime.

Together with 1864051699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1864051699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 932025848 + 932025849.

It is an arithmetic number, because the mean of its divisors is an integer number (932025849).

Almost surely, 2^1864051697 is an apocalyptic number.

It is an amenable number.

1864051697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1864051697 is an equidigital number, since it uses as much as digits as its factorization.

1864051697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 1864051697 is about 43174.6649900147. The cubic root of 1864051697 is about 1230.7012761268.

The spelling of 1864051697 in words is "one billion, eight hundred sixty-four million, fifty-one thousand, six hundred ninety-seven".