1620713513 has 8 divisors (see below), whose sum is σ = 1716503040. Its totient is φ = 1524974400.

The previous prime is 1620713503. The next prime is 1620713557. The reversal of 1620713513 is 3153170261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1620713513 - 2¹² = 1620709417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1620713503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68588 + ... + 89138.

It is an arithmetic number, because the mean of its divisors is an integer number (214562880).

Almost surely, 2^1620713513 is an apocalyptic number.

It is an amenable number.

1620713513 is a deficient number, since it is larger than the sum of its proper divisors (95789527).

1620713513 is a wasteful number, since it uses less digits than its factorization.

1620713513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25207.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 1620713513 is about 40258.0863057349. The cubic root of 1620713513 is about 1174.6326935211.

Adding to 1620713513 its reverse (3153170261), we get a palindrome (4773883774).

The spelling of 1620713513 in words is "one billion, six hundred twenty million, seven hundred thirteen thousand, five hundred thirteen".