1387220707 has 2 divisors, whose sum is σ = 1387220708. Its totient is φ = 1387220706.

The previous prime is 1387220693. The next prime is 1387220711. The reversal of 1387220707 is 7070227831.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1387220707 is a prime.

It is not a weakly prime, because it can be changed into another prime (1387220717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693610353 + 693610354.

It is an arithmetic number, because the mean of its divisors is an integer number (693610354).

Almost surely, 2^1387220707 is an apocalyptic number.

1387220707 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387220707 is an equidigital number, since it uses as much as digits as its factorization.

1387220707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32928, while the sum is 37.

The square root of 1387220707 is about 37245.4118919364. The cubic root of 1387220707 is about 1115.2747101414.

The spelling of 1387220707 in words is "one billion, three hundred eighty-seven million, two hundred twenty thousand, seven hundred seven".