39699197 has 2 divisors, whose sum is σ = 39699198. Its totient is φ = 39699196.

The previous prime is 39699119. The next prime is 39699241. The reversal of 39699197 is 79199693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26925721 + 12773476 = 5189^2 + 3574^2 .

It is a cyclic number.

It is not a de Polignac number, because 39699197 - 2¹² = 39695101 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39699497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19849598 + 19849599.

It is an arithmetic number, because the mean of its divisors is an integer number (19849599).

Almost surely, 2^39699197 is an apocalyptic number.

It is an amenable number.

39699197 is a deficient number, since it is larger than the sum of its proper divisors (1).

39699197 is an equidigital number, since it uses as much as digits as its factorization.

39699197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 826686, while the sum is 53.

The square root of 39699197 is about 6300.7298783554. The cubic root of 39699197 is about 341.1357548933.

The spelling of 39699197 in words is "thirty-nine million, six hundred ninety-nine thousand, one hundred ninety-seven".