1308077521397 has 16 divisors (see below), whose sum is σ = 1322988381360. Its totient is φ = 1293228797952.

The previous prime is 1308077521357. The next prime is 1308077521427. The reversal of 1308077521397 is 7931257708031.

It can be written as a sum of positive squares in 8 ways, for example, as 197093521 + 1307880427876 = 14039^2 + 1143626^2 .

It is a cyclic number.

It is not a de Polignac number, because 1308077521397 - 2²⁰ = 1308076472821 is a prime.

It is a super-3 number, since 3×1308077521397³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1308077521357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92130503 + ... + 92144699.

It is an arithmetic number, because the mean of its divisors is an integer number (82686773835).

Almost surely, 2^{1308077521397} is an apocalyptic number.

It is an amenable number.

1308077521397 is a deficient number, since it is larger than the sum of its proper divisors (14910859963).

1308077521397 is a wasteful number, since it uses less digits than its factorization.

1308077521397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16312.

The product of its (nonzero) digits is 2222640, while the sum is 53.

The spelling of 1308077521397 in words is "one trillion, three hundred eight billion, seventy-seven million, five hundred twenty-one thousand, three hundred ninety-seven".