101900749 has 2 divisors, whose sum is σ = 101900750. Its totient is φ = 101900748.

The previous prime is 101900723. The next prime is 101900753. The reversal of 101900749 is 947009101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79744900 + 22155849 = 8930^2 + 4707^2 .

It is a cyclic number.

It is not a de Polignac number, because 101900749 - 2⁵ = 101900717 is a prime.

It is a super-2 number, since 2×101900749² = 20767525293522002, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 101900749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101900759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50950374 + 50950375.

It is an arithmetic number, because the mean of its divisors is an integer number (50950375).

Almost surely, 2^101900749 is an apocalyptic number.

It is an amenable number.

101900749 is a deficient number, since it is larger than the sum of its proper divisors (1).

101900749 is an equidigital number, since it uses as much as digits as its factorization.

101900749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 101900749 is about 10094.5900857836. The cubic root of 101900749 is about 467.0812768252.

The spelling of 101900749 in words is "one hundred one million, nine hundred thousand, seven hundred forty-nine".