7812969901 has 4 divisors (see below), whose sum is σ = 8523239904. Its totient is φ = 7102699900.

The previous prime is 7812969893. The next prime is 7812969929. The reversal of 7812969901 is 1099692187.

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 not a de Polignac number, because 7812969901 - 2³ = 7812969893 is a prime.

It is a super-2 number, since 2×7812969901² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7812969961) 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, 355134985 + ... + 355135006.

It is an arithmetic number, because the mean of its divisors is an integer number (2130809976).

Almost surely, 2^7812969901 is an apocalyptic number.

It is an amenable number.

7812969901 is a deficient number, since it is larger than the sum of its proper divisors (710270003).

7812969901 is a wasteful number, since it uses less digits than its factorization.

7812969901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710270002.

The product of its (nonzero) digits is 489888, while the sum is 52.

The square root of 7812969901 is about 88391.0057698180. The cubic root of 7812969901 is about 1984.2910966342.

It can be divided in two parts, 781296 and 9901, that added together give a palindrome (791197).

The spelling of 7812969901 in words is "seven billion, eight hundred twelve million, nine hundred sixty-nine thousand, nine hundred one".