7291213297 has 4 divisors (see below), whose sum is σ = 7293266676. Its totient is φ = 7289159920.

The previous prime is 7291213271. The next prime is 7291213309. The reversal of 7291213297 is 7923121927.

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 1580539536 + 5710673761 = 39756^2 + 75569^2 .

It is a cyclic number.

It is not a de Polignac number, because 7291213297 - 2³¹ = 5143729649 is a prime.

It is a super-2 number, since 2×7291213297² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7291213217) 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, 1021354 + ... + 1028467.

It is an arithmetic number, because the mean of its divisors is an integer number (1823316669).

Almost surely, 2^7291213297 is an apocalyptic number.

It is an amenable number.

7291213297 is a deficient number, since it is larger than the sum of its proper divisors (2053379).

7291213297 is a wasteful number, since it uses less digits than its factorization.

7291213297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2053378.

The product of its digits is 95256, while the sum is 43.

The square root of 7291213297 is about 85388.6016807864. The cubic root of 7291213297 is about 1939.0987858082.

The spelling of 7291213297 in words is "seven billion, two hundred ninety-one million, two hundred thirteen thousand, two hundred ninety-seven".