1630925393 has 4 divisors (see below), whose sum is σ = 1632942180. Its totient is φ = 1628908608.

The previous prime is 1630925369. The next prime is 1630925411. The reversal of 1630925393 is 3935290361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3935290361 = 1523 ⋅2583907.

It can be written as a sum of positive squares in 2 ways, for example, as 1286154769 + 344770624 = 35863^2 + 18568^2 .

It is a cyclic number.

It is not a de Polignac number, because 1630925393 - 2¹⁴ = 1630909009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1630925393.

It is not an unprimeable number, because it can be changed into a prime (1630921393) 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, 1007180 + ... + 1008797.

It is an arithmetic number, because the mean of its divisors is an integer number (408235545).

Almost surely, 2^1630925393 is an apocalyptic number.

It is an amenable number.

1630925393 is a deficient number, since it is larger than the sum of its proper divisors (2016787).

1630925393 is an equidigital number, since it uses as much as digits as its factorization.

1630925393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2016786.

The product of its (nonzero) digits is 131220, while the sum is 41.

The square root of 1630925393 is about 40384.7173197981. The cubic root of 1630925393 is about 1177.0945932709.

The spelling of 1630925393 in words is "one billion, six hundred thirty million, nine hundred twenty-five thousand, three hundred ninety-three".