1930400545 has 4 divisors (see below), whose sum is σ = 2316480660. Its totient is φ = 1544320432.

The previous prime is 1930400491. The next prime is 1930400567. The reversal of 1930400545 is 5450040391.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5450040391 = 5023 ⋅1085017.

It can be written as a sum of positive squares in 2 ways, for example, as 201753616 + 1728646929 = 14204^2 + 41577^2 .

It is a cyclic number.

It is not a de Polignac number, because 1930400545 - 2¹³ = 1930392353 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193040050 + ... + 193040059.

It is an arithmetic number, because the mean of its divisors is an integer number (579120165).

Almost surely, 2^1930400545 is an apocalyptic number.

It is an amenable number.

1930400545 is a deficient number, since it is larger than the sum of its proper divisors (386080115).

1930400545 is an equidigital number, since it uses as much as digits as its factorization.

1930400545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386080114.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 1930400545 is about 43936.3237538145. The cubic root of 1930400545 is about 1245.1331922040.

The spelling of 1930400545 in words is "one billion, nine hundred thirty million, four hundred thousand, five hundred forty-five".