7720191397 has 8 divisors (see below), whose sum is σ = 8175182400. Its totient is φ = 7270066944.

The previous prime is 7720191383. The next prime is 7720191407. The reversal of 7720191397 is 7931910277.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7720191397 - 2¹¹ = 7720189349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7720111397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1213372 + ... + 1219717.

It is an arithmetic number, because the mean of its divisors is an integer number (1021897800).

Almost surely, 2^7720191397 is an apocalyptic number.

It is an amenable number.

7720191397 is a deficient number, since it is larger than the sum of its proper divisors (454991003).

7720191397 is a wasteful number, since it uses less digits than its factorization.

7720191397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2433275.

The product of its (nonzero) digits is 166698, while the sum is 46.

The square root of 7720191397 is about 87864.6197112353. The cubic root of 7720191397 is about 1976.4053574469.

The spelling of 7720191397 in words is "seven billion, seven hundred twenty million, one hundred ninety-one thousand, three hundred ninety-seven".