1407721613 has 2 divisors, whose sum is σ = 1407721614. Its totient is φ = 1407721612.

The previous prime is 1407721607. The next prime is 1407721649. The reversal of 1407721613 is 3161277041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1354460809 + 53260804 = 36803^2 + 7298^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1407721613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1407721613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1407721663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703860806 + 703860807.

It is an arithmetic number, because the mean of its divisors is an integer number (703860807).

Almost surely, 2^1407721613 is an apocalyptic number.

It is an amenable number.

1407721613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1407721613 is an equidigital number, since it uses as much as digits as its factorization.

1407721613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 1407721613 is about 37519.6163759706. The cubic root of 1407721613 is about 1120.7418588967.

Adding to 1407721613 its reverse (3161277041), we get a palindrome (4568998654).

The spelling of 1407721613 in words is "one billion, four hundred seven million, seven hundred twenty-one thousand, six hundred thirteen".