65291487 has 16 divisors (see below), whose sum is σ = 90190848. Its totient is φ = 41970240.

The previous prime is 65291483. The next prime is 65291491. The reversal of 65291487 is 78419256.

It is an interprime number because it is at equal distance from previous prime (65291483) and next prime (65291491).

It is not a de Polignac number, because 65291487 - 2² = 65291483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65291483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27988 + ... + 30230.

It is an arithmetic number, because the mean of its divisors is an integer number (5636928).

Almost surely, 2^65291487 is an apocalyptic number.

65291487 is a deficient number, since it is larger than the sum of its proper divisors (24899361).

65291487 is a wasteful number, since it uses less digits than its factorization.

65291487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2590.

The product of its digits is 120960, while the sum is 42.

The square root of 65291487 is about 8080.3147834722. The cubic root of 65291487 is about 402.6726998308.

The spelling of 65291487 in words is "sixty-five million, two hundred ninety-one thousand, four hundred eighty-seven".