1305357097 has 4 divisors (see below), whose sum is σ = 1424025936. Its totient is φ = 1186688260.

The previous prime is 1305357073. The next prime is 1305357107. The reversal of 1305357097 is 7907535031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1305357097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1305357497) 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, 59334403 + ... + 59334424.

It is an arithmetic number, because the mean of its divisors is an integer number (356006484).

Almost surely, 2^1305357097 is an apocalyptic number.

It is an amenable number.

1305357097 is a deficient number, since it is larger than the sum of its proper divisors (118668839).

1305357097 is a wasteful number, since it uses less digits than its factorization.

1305357097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118668838.

The product of its (nonzero) digits is 99225, while the sum is 40.

The square root of 1305357097 is about 36129.7259469263. The cubic root of 1305357097 is about 1092.8899817191.

The spelling of 1305357097 in words is "one billion, three hundred five million, three hundred fifty-seven thousand, ninety-seven".