1903923137 has 2 divisors, whose sum is σ = 1903923138. Its totient is φ = 1903923136.

The previous prime is 1903923127. The next prime is 1903923157. The reversal of 1903923137 is 7313293091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1271350336 + 632572801 = 35656^2 + 25151^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1903923137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1903923137.

It is not a weakly prime, because it can be changed into another prime (1903923107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 951961568 + 951961569.

It is an arithmetic number, because the mean of its divisors is an integer number (951961569).

Almost surely, 2^1903923137 is an apocalyptic number.

It is an amenable number.

1903923137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1903923137 is an equidigital number, since it uses as much as digits as its factorization.

1903923137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 38.

The square root of 1903923137 is about 43633.9676971966. The cubic root of 1903923137 is about 1239.4142084366.

The spelling of 1903923137 in words is "one billion, nine hundred three million, nine hundred twenty-three thousand, one hundred thirty-seven".