7720151 has 2 divisors, whose sum is σ = 7720152. Its totient is φ = 7720150.

The previous prime is 7720123. The next prime is 7720171. The reversal of 7720151 is 1510277.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7720151 - 2¹⁴ = 7703767 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7720121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3860075 + 3860076.

It is an arithmetic number, because the mean of its divisors is an integer number (3860076).

Almost surely, 2^7720151 is an apocalyptic number.

7720151 is a deficient number, since it is larger than the sum of its proper divisors (1).

7720151 is an equidigital number, since it uses as much as digits as its factorization.

7720151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 7720151 is about 2778.5159708017. The cubic root of 7720151 is about 197.6401910167.

The spelling of 7720151 in words is "seven million, seven hundred twenty thousand, one hundred fifty-one".