1621341097 has 2 divisors, whose sum is σ = 1621341098. Its totient is φ = 1621341096.

The previous prime is 1621341089. The next prime is 1621341131. The reversal of 1621341097 is 7901431261.

It is an a-pointer prime, because the next prime (1621341131) can be obtained adding 1621341097 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1250046736 + 371294361 = 35356^2 + 19269^2 .

It is a cyclic number.

It is not a de Polignac number, because 1621341097 - 2³ = 1621341089 is a prime.

It is not a weakly prime, because it can be changed into another prime (1621341067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810670548 + 810670549.

It is an arithmetic number, because the mean of its divisors is an integer number (810670549).

Almost surely, 2^1621341097 is an apocalyptic number.

It is an amenable number.

1621341097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1621341097 is an equidigital number, since it uses as much as digits as its factorization.

1621341097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1621341097 is about 40265.8800599217. The cubic root of 1621341097 is about 1174.7842904457.

The spelling of 1621341097 in words is "one billion, six hundred twenty-one million, three hundred forty-one thousand, ninety-seven".