194152997 has 2 divisors, whose sum is σ = 194152998. Its totient is φ = 194152996.

The previous prime is 194152967. The next prime is 194153009. The reversal of 194152997 is 799251491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193376836 + 776161 = 13906^2 + 881^2 .

It is an emirp because it is prime and its reverse (799251491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194152997 - 2⁸ = 194152741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194152927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97076498 + 97076499.

It is an arithmetic number, because the mean of its divisors is an integer number (97076499).

Almost surely, 2^194152997 is an apocalyptic number.

It is an amenable number.

194152997 is a deficient number, since it is larger than the sum of its proper divisors (1).

194152997 is an equidigital number, since it uses as much as digits as its factorization.

194152997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 47.

The square root of 194152997 is about 13933.8794669683. The cubic root of 194152997 is about 579.0481782440.

The spelling of 194152997 in words is "one hundred ninety-four million, one hundred fifty-two thousand, nine hundred ninety-seven".