1393431510969 has 9 divisors (see below), whose sum is σ = 2012739519973. Its totient is φ = 928951979772.

The previous prime is 1393431510941. The next prime is 1393431510971. The reversal of 1393431510969 is 9690151343931.

The square root of 1393431510969 is 1180437.

It is a perfect power (a square), and thus also a powerful number.

1393431510969 is a `hidden beast` number, since 1 + 3 + 9 + 3 + 4 + 31 + 510 + 96 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1393431510969 - 2⁷ = 1393431510841 is a prime.

It is a super-2 number, since 2×1393431510969² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1393431510269) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3344572 + ... + 3738050.

Almost surely, 2^{1393431510969} is an apocalyptic number.

1393431510969 is the 1180437-th square number.

1393431510969 is the 590219-th centered octagonal number.

It is an amenable number.

1393431510969 is a deficient number, since it is larger than the sum of its proper divisors (619308009004).

1393431510969 is an frugal number, since it uses more digits than its factorization.

1393431510969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786964 (or 393482 counting only the distinct ones).

The product of its (nonzero) digits is 2361960, while the sum is 54.

It can be divided in two parts, 1393431 and 510969, that added together give a square (1904400 = 1380²).

The spelling of 1393431510969 in words is "one trillion, three hundred ninety-three billion, four hundred thirty-one million, five hundred ten thousand, nine hundred sixty-nine".