7621387349 has 2 divisors, whose sum is σ = 7621387350. Its totient is φ = 7621387348.

The previous prime is 7621387321. The next prime is 7621387409. The reversal of 7621387349 is 9437831267.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5153086225 + 2468301124 = 71785^2 + 49682^2 .

It is a cyclic number.

It is not a de Polignac number, because 7621387349 - 2⁸ = 7621387093 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7621387297 and 7621387306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7629387349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3810693674 + 3810693675.

It is an arithmetic number, because the mean of its divisors is an integer number (3810693675).

Almost surely, 2^7621387349 is an apocalyptic number.

It is an amenable number.

7621387349 is a deficient number, since it is larger than the sum of its proper divisors (1).

7621387349 is an equidigital number, since it uses as much as digits as its factorization.

7621387349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 50.

The square root of 7621387349 is about 87300.5575526296. The cubic root of 7621387349 is about 1967.9376967526.

The spelling of 7621387349 in words is "seven billion, six hundred twenty-one million, three hundred eighty-seven thousand, three hundred forty-nine".