1487706397 has 18 divisors (see below), whose sum is σ = 1627441998. Its totient is φ = 1358698752.

The previous prime is 1487706377. The next prime is 1487706413. The reversal of 1487706397 is 7936077841.

It can be written as a sum of positive squares in 9 ways, for example, as 44542276 + 1443164121 = 6674^2 + 37989^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1487706397 is a prime.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1487706317) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3988303 + ... + 3988675.

Almost surely, 2^1487706397 is an apocalyptic number.

1487706397 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1487706397 is a deficient number, since it is larger than the sum of its proper divisors (139735601).

1487706397 is an frugal number, since it uses more digits than its factorization.

1487706397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817 (or 427 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 52.

The square root of 1487706397 is about 38570.7972046210. The cubic root of 1487706397 is about 1141.5784017246.

The spelling of 1487706397 in words is "one billion, four hundred eighty-seven million, seven hundred six thousand, three hundred ninety-seven".