7978153197 has 12 divisors (see below), whose sum is σ = 12374278656. Its totient is φ = 4558944600.

The previous prime is 7978153189. The next prime is 7978153201. The reversal of 7978153197 is 7913518797.

It is a happy number.

It is not a de Polignac number, because 7978153197 - 2³ = 7978153189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7978153147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27136429 + ... + 27136722.

It is an arithmetic number, because the mean of its divisors is an integer number (1031189888).

Almost surely, 2^7978153197 is an apocalyptic number.

It is an amenable number.

7978153197 is a deficient number, since it is larger than the sum of its proper divisors (4396125459).

7978153197 is a wasteful number, since it uses less digits than its factorization.

7978153197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54273168 (or 54273161 counting only the distinct ones).

The product of its digits is 3333960, while the sum is 57.

The square root of 7978153197 is about 89320.5082665790. The cubic root of 7978153197 is about 1998.1777733325.

The spelling of 7978153197 in words is "seven billion, nine hundred seventy-eight million, one hundred fifty-three thousand, one hundred ninety-seven".