97950409 has 2 divisors, whose sum is σ = 97950410. Its totient is φ = 97950408.

The previous prime is 97950407. The next prime is 97950473. The reversal of 97950409 is 90405979.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80910025 + 17040384 = 8995^2 + 4128^2 .

It is a cyclic number.

It is not a de Polignac number, because 97950409 - 2¹ = 97950407 is a prime.

Together with 97950407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (97950407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48975204 + 48975205.

It is an arithmetic number, because the mean of its divisors is an integer number (48975205).

Almost surely, 2^97950409 is an apocalyptic number.

It is an amenable number.

97950409 is a deficient number, since it is larger than the sum of its proper divisors (1).

97950409 is an equidigital number, since it uses as much as digits as its factorization.

97950409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 97950409 is about 9896.9898959229. The cubic root of 97950409 is about 460.9658486879.

The spelling of 97950409 in words is "ninety-seven million, nine hundred fifty thousand, four hundred nine".