101051989 has 4 divisors (see below), whose sum is σ = 101109600. Its totient is φ = 100994380.

The previous prime is 101051953. The next prime is 101052011. The reversal of 101051989 is 989150101.

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, and also an emirpimes, since its reverse is a distinct semiprime: 989150101 = 263 ⋅3761027.

It is a cyclic number.

It is not a de Polignac number, because 101051989 - 2¹¹ = 101049941 is a prime.

It is a super-2 number, since 2×101051989² = 20423008961712242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101051939) 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, 26089 + ... + 29710.

It is an arithmetic number, because the mean of its divisors is an integer number (25277400).

Almost surely, 2^101051989 is an apocalyptic number.

It is an amenable number.

101051989 is a deficient number, since it is larger than the sum of its proper divisors (57611).

101051989 is an equidigital number, since it uses as much as digits as its factorization.

101051989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57610.

The product of its (nonzero) digits is 3240, while the sum is 34.

The square root of 101051989 is about 10052.4618377788. The cubic root of 101051989 is about 465.7808424428.

The spelling of 101051989 in words is "one hundred one million, fifty-one thousand, nine hundred eighty-nine".