747981 has 16 divisors (see below), whose sum is σ = 1193920. Its totient is φ = 460080.

The previous prime is 747979. The next prime is 747991. The reversal of 747981 is 189747.

It is not a de Polignac number, because 747981 - 2¹ = 747979 is a prime.

It is a super-2 number, since 2×747981² = 1118951152722, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747941) 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, 715 + ... + 1416.

It is an arithmetic number, because the mean of its divisors is an integer number (74620).

2⁷⁴⁷⁹⁸¹ is an apocalyptic number.

It is an amenable number.

747981 is a deficient number, since it is larger than the sum of its proper divisors (445939).

747981 is a wasteful number, since it uses less digits than its factorization.

747981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2153 (or 2147 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 747981 is about 864.8589480372. The cubic root of 747981 is about 90.7744282301.

It can be divided in two parts, 747 and 981, that added together give a cube (1728 = 12³).

The spelling of 747981 in words is "seven hundred forty-seven thousand, nine hundred eighty-one".