1523720651 has 2 divisors, whose sum is σ = 1523720652. Its totient is φ = 1523720650.

The previous prime is 1523720593. The next prime is 1523720663. The reversal of 1523720651 is 1560273251.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1523720651 - 2²² = 1519526347 is a prime.

It is not a weakly prime, because it can be changed into another prime (1523320651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 761860325 + 761860326.

It is an arithmetic number, because the mean of its divisors is an integer number (761860326).

Almost surely, 2^1523720651 is an apocalyptic number.

1523720651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1523720651 is an equidigital number, since it uses as much as digits as its factorization.

1523720651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 1523720651 is about 39034.8645572135. The cubic root of 1523720651 is about 1150.7167934584.

The spelling of 1523720651 in words is "one billion, five hundred twenty-three million, seven hundred twenty thousand, six hundred fifty-one".