102038749 has 4 divisors (see below), whose sum is σ = 102067164. Its totient is φ = 102010336.

The previous prime is 102038723. The next prime is 102038753. The reversal of 102038749 is 947830201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 59397849 + 42640900 = 7707^2 + 6530^2 .

It is a cyclic number.

It is not a de Polignac number, because 102038749 - 2¹⁷ = 101907677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102038149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7882 + ... + 16315.

It is an arithmetic number, because the mean of its divisors is an integer number (25516791).

Almost surely, 2^102038749 is an apocalyptic number.

It is an amenable number.

102038749 is a deficient number, since it is larger than the sum of its proper divisors (28415).

102038749 is an equidigital number, since it uses as much as digits as its factorization.

102038749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28414.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 102038749 is about 10101.4231175612. The cubic root of 102038749 is about 467.2920313795.

The spelling of 102038749 in words is "one hundred two million, thirty-eight thousand, seven hundred forty-nine".