1651241387 has 2 divisors, whose sum is σ = 1651241388. Its totient is φ = 1651241386.

The previous prime is 1651241363. The next prime is 1651241407. The reversal of 1651241387 is 7831421561.

It is a strong prime.

It is an emirp because it is prime and its reverse (7831421561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1651241387 - 2²⁴ = 1634464171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1651241387.

It is not a weakly prime, because it can be changed into another prime (1651241087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825620693 + 825620694.

It is an arithmetic number, because the mean of its divisors is an integer number (825620694).

Almost surely, 2^1651241387 is an apocalyptic number.

1651241387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1651241387 is an equidigital number, since it uses as much as digits as its factorization.

1651241387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 38.

The square root of 1651241387 is about 40635.4695678541. The cubic root of 1651241387 is about 1181.9620205234.

The spelling of 1651241387 in words is "one billion, six hundred fifty-one million, two hundred forty-one thousand, three hundred eighty-seven".