397484749 has 2 divisors, whose sum is σ = 397484750. Its totient is φ = 397484748.

The previous prime is 397484743. The next prime is 397484761. The reversal of 397484749 is 947484793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213014025 + 184470724 = 14595^2 + 13582^2 .

It is a cyclic number.

It is not a de Polignac number, because 397484749 - 2¹³ = 397476557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 397484749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397484743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198742374 + 198742375.

It is an arithmetic number, because the mean of its divisors is an integer number (198742375).

Almost surely, 2^397484749 is an apocalyptic number.

It is an amenable number.

397484749 is a deficient number, since it is larger than the sum of its proper divisors (1).

397484749 is an equidigital number, since it uses as much as digits as its factorization.

397484749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 55.

The square root of 397484749 is about 19937.0195616095. The cubic root of 397484749 is about 735.2586739730.

The spelling of 397484749 in words is "three hundred ninety-seven million, four hundred eighty-four thousand, seven hundred forty-nine".