7420731961 has 4 divisors (see below), whose sum is σ = 7676619300. Its totient is φ = 7164844624.

The previous prime is 7420731959. The next prime is 7420731971. The reversal of 7420731961 is 1691370247.

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 4987184400 + 2433547561 = 70620^2 + 49331^2 .

It is a cyclic number.

It is not a de Polignac number, because 7420731961 - 2¹ = 7420731959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7420731971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127943626 + ... + 127943683.

It is an arithmetic number, because the mean of its divisors is an integer number (1919154825).

Almost surely, 2^7420731961 is an apocalyptic number.

It is an amenable number.

7420731961 is a deficient number, since it is larger than the sum of its proper divisors (255887339).

7420731961 is a wasteful number, since it uses less digits than its factorization.

7420731961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255887338.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 7420731961 is about 86143.6704639406. The cubic root of 7420731961 is about 1950.5132955995.

The spelling of 7420731961 in words is "seven billion, four hundred twenty million, seven hundred thirty-one thousand, nine hundred sixty-one".