1520302493 has 2 divisors, whose sum is σ = 1520302494. Its totient is φ = 1520302492.

The previous prime is 1520302463. The next prime is 1520302517. The reversal of 1520302493 is 3942030251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1514532889 + 5769604 = 38917^2 + 2402^2 .

It is an emirp because it is prime and its reverse (3942030251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1520302493 - 2⁶ = 1520302429 is a prime.

It is a super-2 number, since 2×1520302493² = 4622639340444030098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1520302463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760151246 + 760151247.

It is an arithmetic number, because the mean of its divisors is an integer number (760151247).

Almost surely, 2^1520302493 is an apocalyptic number.

It is an amenable number.

1520302493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1520302493 is an equidigital number, since it uses as much as digits as its factorization.

1520302493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 1520302493 is about 38991.0565771178. The cubic root of 1520302493 is about 1149.8556827091.

The spelling of 1520302493 in words is "one billion, five hundred twenty million, three hundred two thousand, four hundred ninety-three".