1022020397 has 4 divisors (see below), whose sum is σ = 1028788896. Its totient is φ = 1015251900.

The previous prime is 1022020379. The next prime is 1022020429. The reversal of 1022020397 is 7930202201.

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 1022020397 - 2¹⁴ = 1022004013 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 (1022020357) 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, 3384023 + ... + 3384324.

It is an arithmetic number, because the mean of its divisors is an integer number (257197224).

Almost surely, 2^1022020397 is an apocalyptic number.

It is an amenable number.

1022020397 is a deficient number, since it is larger than the sum of its proper divisors (6768499).

1022020397 is an equidigital number, since it uses as much as digits as its factorization.

1022020397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6768498.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 1022020397 is about 31969.0537395150. The cubic root of 1022020397 is about 1007.2869043821.

Adding to 1022020397 its reverse (7930202201), we get a palindrome (8952222598).

The spelling of 1022020397 in words is "one billion, twenty-two million, twenty thousand, three hundred ninety-seven".