247986494 has 16 divisors (see below), whose sum is σ = 426819456. Its totient is φ = 105855000.

The previous prime is 247986467. The next prime is 247986521. The reversal of 247986494 is 494689742.

It is an interprime number because it is at equal distance from previous prime (247986467) and next prime (247986521).

It is a super-2 number, since 2×247986494² = 122994602412824072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31772 + ... + 38799.

It is an arithmetic number, because the mean of its divisors is an integer number (26676216).

Almost surely, 2^247986494 is an apocalyptic number.

247986494 is a deficient number, since it is larger than the sum of its proper divisors (178832962).

247986494 is a wasteful number, since it uses less digits than its factorization.

247986494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70831.

The product of its digits is 3483648, while the sum is 53.

The square root of 247986494 is about 15747.5869262564. The cubic root of 247986494 is about 628.2647250328.

The spelling of 247986494 in words is "two hundred forty-seven million, nine hundred eighty-six thousand, four hundred ninety-four".