7203972661 has 4 divisors (see below), whose sum is σ = 7302657292. Its totient is φ = 7105288032.

The previous prime is 7203972647. The next prime is 7203972701. The reversal of 7203972661 is 1662793027.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3773644900 + 3430327761 = 61430^2 + 58569^2 .

It is a cyclic number.

It is not a de Polignac number, because 7203972661 - 2¹⁵ = 7203939893 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 (7203972361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49342206 + ... + 49342351.

It is an arithmetic number, because the mean of its divisors is an integer number (1825664323).

Almost surely, 2^7203972661 is an apocalyptic number.

It is an amenable number.

7203972661 is a deficient number, since it is larger than the sum of its proper divisors (98684631).

7203972661 is an equidigital number, since it uses as much as digits as its factorization.

7203972661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98684630.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 7203972661 is about 84876.2196436670. The cubic root of 7203972661 is about 1931.3338485451. Note that the first 3 decimals are identical.

The spelling of 7203972661 in words is "seven billion, two hundred three million, nine hundred seventy-two thousand, six hundred sixty-one".