102991740 has 24 divisors (see below), whose sum is σ = 288377040. Its totient is φ = 27464448.

The previous prime is 102991709. The next prime is 102991829. The reversal of 102991740 is 47199201.

102991740 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

102991740 is strictly pandigital in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 858205 + ... + 858324.

It is an arithmetic number, because the mean of its divisors is an integer number (12015710).

Almost surely, 2^102991740 is an apocalyptic number.

102991740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102991740 is an abundant number, since it is smaller than the sum of its proper divisors (185385300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102991740 is a wasteful number, since it uses less digits than its factorization.

102991740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716541 (or 1716539 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 102991740 is about 10148.4846159414. The cubic root of 102991740 is about 468.7422839619.

The spelling of 102991740 in words is "one hundred two million, nine hundred ninety-one thousand, seven hundred forty".