102190749 has 8 divisors (see below), whose sum is σ = 136374432. Its totient is φ = 68067120.

The previous prime is 102190733. The next prime is 102190763. The reversal of 102190749 is 947091201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102190749 - 2⁴ = 102190733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102190769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10879 + ... + 17964.

It is an arithmetic number, because the mean of its divisors is an integer number (17046804).

Almost surely, 2^102190749 is an apocalyptic number.

It is an amenable number.

102190749 is a deficient number, since it is larger than the sum of its proper divisors (34183683).

102190749 is a wasteful number, since it uses less digits than its factorization.

102190749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30027.

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

The square root of 102190749 is about 10108.9440101328. The cubic root of 102190749 is about 467.5239470323.

The spelling of 102190749 in words is "one hundred two million, one hundred ninety thousand, seven hundred forty-nine".