1387698966 has 20 divisors (see below), whose sum is σ = 3109473972. Its totient is φ = 462566268.

The previous prime is 1387698919. The next prime is 1387698971. The reversal of 1387698966 is 6698967831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4282860 + ... + 4283183.

Almost surely, 2^1387698966 is an apocalyptic number.

1387698966 is an abundant number, since it is smaller than the sum of its proper divisors (1721775006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1387698966 is an equidigital number, since it uses as much as digits as its factorization.

1387698966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8566057 (or 8566048 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The square root of 1387698966 is about 37251.8317133534. The cubic root of 1387698966 is about 1115.4028629963.

The spelling of 1387698966 in words is "one billion, three hundred eighty-seven million, six hundred ninety-eight thousand, nine hundred sixty-six".