1587648497 has 4 divisors (see below), whose sum is σ = 1588700736. Its totient is φ = 1586596260.

The previous prime is 1587648487. The next prime is 1587648499. The reversal of 1587648497 is 7948467851.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1587648497 - 2⁴ = 1587648481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1587648499) 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, 523853 + ... + 526874.

It is an arithmetic number, because the mean of its divisors is an integer number (397175184).

Almost surely, 2^1587648497 is an apocalyptic number.

It is an amenable number.

1587648497 is a deficient number, since it is larger than the sum of its proper divisors (1052239).

1587648497 is a wasteful number, since it uses less digits than its factorization.

1587648497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052238.

The product of its digits is 13547520, while the sum is 59.

The square root of 1587648497 is about 39845.3070887903. The cubic root of 1587648497 is about 1166.5896495100.

The spelling of 1587648497 in words is "one billion, five hundred eighty-seven million, six hundred forty-eight thousand, four hundred ninety-seven".