1620750003 has 4 divisors (see below), whose sum is σ = 2161000008. Its totient is φ = 1080500000.

The previous prime is 1620749987. The next prime is 1620750007. The reversal of 1620750003 is 3000570261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1620750003 - 2⁴ = 1620749987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1620750007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270124998 + ... + 270125003.

It is an arithmetic number, because the mean of its divisors is an integer number (540250002).

Almost surely, 2^1620750003 is an apocalyptic number.

1620750003 is a deficient number, since it is larger than the sum of its proper divisors (540250005).

1620750003 is an equidigital number, since it uses as much as digits as its factorization.

1620750003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540250004.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 1620750003 is about 40258.5395040605. The cubic root of 1620750003 is about 1174.6415089851.

The spelling of 1620750003 in words is "one billion, six hundred twenty million, seven hundred fifty thousand, three".