1908623897 has 2 divisors, whose sum is σ = 1908623898. Its totient is φ = 1908623896.

The previous prime is 1908623869. The next prime is 1908623911. The reversal of 1908623897 is 7983268091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1572598336 + 336025561 = 39656^2 + 18331^2 .

It is a cyclic number.

It is not a de Polignac number, because 1908623897 - 2¹⁰ = 1908622873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1908623867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 954311948 + 954311949.

It is an arithmetic number, because the mean of its divisors is an integer number (954311949).

Almost surely, 2^1908623897 is an apocalyptic number.

It is an amenable number.

1908623897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1908623897 is an equidigital number, since it uses as much as digits as its factorization.

1908623897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The square root of 1908623897 is about 43687.8003222868. The cubic root of 1908623897 is about 1240.4334023072.

The spelling of 1908623897 in words is "one billion, nine hundred eight million, six hundred twenty-three thousand, eight hundred ninety-seven".