1487920957 has 4 divisors (see below), whose sum is σ = 1504639260. Its totient is φ = 1471202656.

The previous prime is 1487920949. The next prime is 1487920963. The reversal of 1487920957 is 7590297841.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 272283001 + 1215637956 = 16501^2 + 34866^2 .

It is a cyclic number.

It is not a de Polignac number, because 1487920957 - 2³ = 1487920949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1487920157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8359018 + ... + 8359195.

It is an arithmetic number, because the mean of its divisors is an integer number (376159815).

Almost surely, 2^1487920957 is an apocalyptic number.

It is an amenable number.

1487920957 is a deficient number, since it is larger than the sum of its proper divisors (16718303).

1487920957 is an equidigital number, since it uses as much as digits as its factorization.

1487920957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16718302.

The product of its (nonzero) digits is 1270080, while the sum is 52.

The square root of 1487920957 is about 38573.5784832053. The cubic root of 1487920957 is about 1141.6332793286.

The spelling of 1487920957 in words is "one billion, four hundred eighty-seven million, nine hundred twenty thousand, nine hundred fifty-seven".