501147986 has 4 divisors (see below), whose sum is σ = 751721982. Its totient is φ = 250573992.

The previous prime is 501147979. The next prime is 501148013. The reversal of 501147986 is 689741105.

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

It can be written as a sum of positive squares in only one way, i.e., 498137761 + 3010225 = 22319^2 + 1735^2 .

It is a super-2 number, since 2×501147986² = 502298607743712392, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125286995 + ... + 125286998.

Almost surely, 2^501147986 is an apocalyptic number.

501147986 is a deficient number, since it is larger than the sum of its proper divisors (250573996).

501147986 is a wasteful number, since it uses less digits than its factorization.

501147986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250573995.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 501147986 is about 22386.3348049653. The cubic root of 501147986 is about 794.3074997506.

The spelling of 501147986 in words is "five hundred one million, one hundred forty-seven thousand, nine hundred eighty-six".