1451381639 has 2 divisors, whose sum is σ = 1451381640. Its totient is φ = 1451381638.

The previous prime is 1451381629. The next prime is 1451381641. The reversal of 1451381639 is 9361831541.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1451381639 - 2⁸ = 1451381383 is a prime.

Together with 1451381641, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1451381596 and 1451381605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1451381629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 725690819 + 725690820.

It is an arithmetic number, because the mean of its divisors is an integer number (725690820).

Almost surely, 2^1451381639 is an apocalyptic number.

1451381639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1451381639 is an equidigital number, since it uses as much as digits as its factorization.

1451381639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 41.

The square root of 1451381639 is about 38097.0030186103. The cubic root of 1451381639 is about 1132.2105783360.

The spelling of 1451381639 in words is "one billion, four hundred fifty-one million, three hundred eighty-one thousand, six hundred thirty-nine".