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1022020109 = 1192910919
BaseRepresentation
bin111100111010101…
…100101000001101
32122020010000000122
4330322230220031
54043114120414
6245225234325
734220012315
oct7472545015
92566100018
101022020109
114849a3920
122463329a5
13133979c36
1499a40445
155ead0b8e
hex3ceaca0d

1022020109 has 4 divisors (see below), whose sum is σ = 1114931040. Its totient is φ = 929109180.

The previous prime is 1022020099. The next prime is 1022020151. The reversal of 1022020109 is 9010202201.

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 a cyclic number.

It is not a de Polignac number, because 1022020109 - 216 = 1021954573 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 (1022020159) 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, 46455449 + ... + 46455470.

It is an arithmetic number, because the mean of its divisors is an integer number (278732760).

Almost surely, 21022020109 is an apocalyptic number.

It is an amenable number.

1022020109 is a deficient number, since it is larger than the sum of its proper divisors (92910931).

1022020109 is an equidigital number, since it uses as much as digits as its factorization.

1022020109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92910930.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1022020109 is about 31969.0492351587. The cubic root of 1022020109 is about 1007.2868097661.

The spelling of 1022020109 in words is "one billion, twenty-two million, twenty thousand, one hundred nine".

Divisors: 1 11 92910919 1022020109