1925650691 has 2 divisors, whose sum is σ = 1925650692. Its totient is φ = 1925650690.

The previous prime is 1925650667. The next prime is 1925650697. The reversal of 1925650691 is 1960565291.

It is a strong prime.

It is an emirp because it is prime and its reverse (1960565291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1925650691 - 2¹⁰ = 1925649667 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1925650697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 962825345 + 962825346.

It is an arithmetic number, because the mean of its divisors is an integer number (962825346).

Almost surely, 2^1925650691 is an apocalyptic number.

1925650691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1925650691 is an equidigital number, since it uses as much as digits as its factorization.

1925650691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145800, while the sum is 44.

The square root of 1925650691 is about 43882.2366225788. The cubic root of 1925650691 is about 1244.1111144688. Note that the first 5 decimals are identical.

The spelling of 1925650691 in words is "one billion, nine hundred twenty-five million, six hundred fifty thousand, six hundred ninety-one".