31187343900969 has 15 divisors (see below), whose sum is σ = 46588576464397. Its totient is φ = 20791529093268.

The previous prime is 31187343900967. The next prime is 31187343900991. The reversal of 31187343900969 is 96900934378113.

The square root of 31187343900969 is 5584563.

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

31187343900969 is a `hidden beast` number, since 3 + 1 + 187 + 3 + 4 + 390 + 0 + 9 + 69 = 666.

It is not a de Polignac number, because 31187343900969 - 2¹ = 31187343900967 is a prime.

It is a super-2 number, since 2×31187343900969² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31187343900967) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 49950814 + ... + 50571320.

Almost surely, 2^{31187343900969} is an apocalyptic number.

31187343900969 is the 5584563-rd square number.

31187343900969 is the 2792282-nd centered octagonal number.

It is an amenable number.

31187343900969 is a deficient number, since it is larger than the sum of its proper divisors (15401232563428).

31187343900969 is an frugal number, since it uses more digits than its factorization.

31187343900969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241026 (or 620510 counting only the distinct ones).

The product of its (nonzero) digits is 26453952, while the sum is 63.

The spelling of 31187343900969 in words is "thirty-one trillion, one hundred eighty-seven billion, three hundred forty-three million, nine hundred thousand, nine hundred sixty-nine".