1407721663 has 2 divisors, whose sum is σ = 1407721664. Its totient is φ = 1407721662.

The previous prime is 1407721661. The next prime is 1407721673. The reversal of 1407721663 is 3661277041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1407721663 - 2¹ = 1407721661 is a prime.

Together with 1407721661, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1407721661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703860831 + 703860832.

It is an arithmetic number, because the mean of its divisors is an integer number (703860832).

Almost surely, 2^1407721663 is an apocalyptic number.

1407721663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1407721663 is an equidigital number, since it uses as much as digits as its factorization.

1407721663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 1407721663 is about 37519.6170422887. The cubic root of 1407721663 is about 1120.7418721657.

The spelling of 1407721663 in words is "one billion, four hundred seven million, seven hundred twenty-one thousand, six hundred sixty-three".