7621609493 has 2 divisors, whose sum is σ = 7621609494. Its totient is φ = 7621609492.

The previous prime is 7621609477. The next prime is 7621609537. The reversal of 7621609493 is 3949061267.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4397413969 + 3224195524 = 66313^2 + 56782^2 .

It is a cyclic number.

It is not a de Polignac number, because 7621609493 - 2⁴ = 7621609477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7621609693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3810804746 + 3810804747.

It is an arithmetic number, because the mean of its divisors is an integer number (3810804747).

Almost surely, 2^7621609493 is an apocalyptic number.

It is an amenable number.

7621609493 is a deficient number, since it is larger than the sum of its proper divisors (1).

7621609493 is an equidigital number, since it uses as much as digits as its factorization.

7621609493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 47.

The square root of 7621609493 is about 87301.8298376386. The cubic root of 7621609493 is about 1967.9568166881.

The spelling of 7621609493 in words is "seven billion, six hundred twenty-one million, six hundred nine thousand, four hundred ninety-three".