101440749 has 4 divisors (see below), whose sum is σ = 135254336. Its totient is φ = 67627164.

The previous prime is 101440739. The next prime is 101440763. The reversal of 101440749 is 947044101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 101440749 - 2⁴ = 101440733 is a prime.

It is a super-3 number, since 3×101440749³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101440739) 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, 16906789 + ... + 16906794.

It is an arithmetic number, because the mean of its divisors is an integer number (33813584).

Almost surely, 2^101440749 is an apocalyptic number.

It is an amenable number.

101440749 is a deficient number, since it is larger than the sum of its proper divisors (33813587).

101440749 is an equidigital number, since it uses as much as digits as its factorization.

101440749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33813586.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 101440749 is about 10071.7798327803. The cubic root of 101440749 is about 466.3773843758.

The spelling of 101440749 in words is "one hundred one million, four hundred forty thousand, seven hundred forty-nine".