1396700787 has 6 divisors (see below), whose sum is σ = 1862354028. Its totient is φ = 931090704.

The previous prime is 1396700779. The next prime is 1396700791. The reversal of 1396700787 is 7870076931.

It is a happy number.

It is not a de Polignac number, because 1396700787 - 2³ = 1396700779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1396700707) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53943 + ... + 75519.

It is an arithmetic number, because the mean of its divisors is an integer number (310392338).

Almost surely, 2^1396700787 is an apocalyptic number.

1396700787 is a deficient number, since it is larger than the sum of its proper divisors (465653241).

1396700787 is an frugal number, since it uses more digits than its factorization.

1396700787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43157 (or 21580 counting only the distinct ones).

The product of its (nonzero) digits is 444528, while the sum is 48.

The square root of 1396700787 is about 37372.4602749137. The cubic root of 1396700787 is about 1117.8094906243.

Multiplying 1396700787 by its sum of digits (48), we get a square (67041637776 = 258924²).

The spelling of 1396700787 in words is "one billion, three hundred ninety-six million, seven hundred thousand, seven hundred eighty-seven".