1630513573 has 4 divisors (see below), whose sum is σ = 1755937708. Its totient is φ = 1505089440.

The previous prime is 1630513567. The next prime is 1630513579. The reversal of 1630513573 is 3753150361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3753150361 = 47 ⋅79854263.

It is an interprime number because it is at equal distance from previous prime (1630513567) and next prime (1630513579).

It can be written as a sum of positive squares in 2 ways, for example, as 1063216449 + 567297124 = 32607^2 + 23818^2 .

It is a cyclic number.

It is not a de Polignac number, because 1630513573 - 2²¹ = 1628416421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1630513579) 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, 62712048 + ... + 62712073.

It is an arithmetic number, because the mean of its divisors is an integer number (438984427).

Almost surely, 2^1630513573 is an apocalyptic number.

1630513573 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1630513573 is a deficient number, since it is larger than the sum of its proper divisors (125424135).

1630513573 is a wasteful number, since it uses less digits than its factorization.

1630513573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125424134.

The product of its (nonzero) digits is 28350, while the sum is 34.

The square root of 1630513573 is about 40379.6182869526. The cubic root of 1630513573 is about 1176.9955100747.

The spelling of 1630513573 in words is "one billion, six hundred thirty million, five hundred thirteen thousand, five hundred seventy-three".