309902041 has 2 divisors, whose sum is σ = 309902042. Its totient is φ = 309902040.

The previous prime is 309902003. The next prime is 309902051. The reversal of 309902041 is 140209903.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 309900816 + 1225 = 17604^2 + 35^2 .

It is a cyclic number.

It is not a de Polignac number, because 309902041 - 2¹³ = 309893849 is a prime.

It is not a weakly prime, because it can be changed into another prime (309902051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154951020 + 154951021.

It is an arithmetic number, because the mean of its divisors is an integer number (154951021).

Almost surely, 2^309902041 is an apocalyptic number.

It is an amenable number.

309902041 is a deficient number, since it is larger than the sum of its proper divisors (1).

309902041 is an equidigital number, since it uses as much as digits as its factorization.

309902041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 309902041 is about 17604.0347931944. The cubic root of 309902041 is about 676.7186498873.

The spelling of 309902041 in words is "three hundred nine million, nine hundred two thousand, forty-one".