65490987 has 16 divisors (see below), whose sum is σ = 94206240. Its totient is φ = 40315392.

The previous prime is 65490983. The next prime is 65490989. The reversal of 65490987 is 78909456.

It is not a de Polignac number, because 65490987 - 2² = 65490983 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (65490983) 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, 9412 + ... + 14817.

It is an arithmetic number, because the mean of its divisors is an integer number (5887890).

Almost surely, 2^65490987 is an apocalyptic number.

65490987 is a deficient number, since it is larger than the sum of its proper divisors (28715253).

65490987 is a wasteful number, since it uses less digits than its factorization.

65490987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24302.

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 65490987 is about 8092.6501839632. The cubic root of 65490987 is about 403.0824087928.

The spelling of 65490987 in words is "sixty-five million, four hundred ninety thousand, nine hundred eighty-seven".