1545870923 has 2 divisors, whose sum is σ = 1545870924. Its totient is φ = 1545870922.

The previous prime is 1545870901. The next prime is 1545870943. The reversal of 1545870923 is 3290785451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1545870923 - 2¹² = 1545866827 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1545870943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 772935461 + 772935462.

It is an arithmetic number, because the mean of its divisors is an integer number (772935462).

Almost surely, 2^1545870923 is an apocalyptic number.

1545870923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1545870923 is an equidigital number, since it uses as much as digits as its factorization.

1545870923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 1545870923 is about 39317.5650695716. The cubic root of 1545870923 is about 1156.2659664588.

The spelling of 1545870923 in words is "one billion, five hundred forty-five million, eight hundred seventy thousand, nine hundred twenty-three".