7609688981 has 4 divisors (see below), whose sum is σ = 7610047200. Its totient is φ = 7609330764.

The previous prime is 7609688969. The next prime is 7609688987. The reversal of 7609688981 is 1898869067.

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 7609688981 - 2¹⁸ = 7609426837 is a prime.

It is a super-2 number, since 2×7609688981² (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 (7609688987) 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, 145091 + ... + 190448.

It is an arithmetic number, because the mean of its divisors is an integer number (1902511800).

Almost surely, 2^7609688981 is an apocalyptic number.

It is an amenable number.

7609688981 is a deficient number, since it is larger than the sum of its proper divisors (358219).

7609688981 is a wasteful number, since it uses less digits than its factorization.

7609688981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358218.

The product of its (nonzero) digits is 10450944, while the sum is 62.

The square root of 7609688981 is about 87233.5312881463. The cubic root of 7609688981 is about 1966.9302927491.

The spelling of 7609688981 in words is "seven billion, six hundred nine million, six hundred eighty-eight thousand, nine hundred eighty-one".