161214997 has 2 divisors, whose sum is σ = 161214998. Its totient is φ = 161214996.

The previous prime is 161214983. The next prime is 161215003. The reversal of 161214997 is 799412161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133610481 + 27604516 = 11559^2 + 5254^2 .

It is a cyclic number.

It is not a de Polignac number, because 161214997 - 2²³ = 152826389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161214197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80607498 + 80607499.

It is an arithmetic number, because the mean of its divisors is an integer number (80607499).

Almost surely, 2^161214997 is an apocalyptic number.

It is an amenable number.

161214997 is a deficient number, since it is larger than the sum of its proper divisors (1).

161214997 is an equidigital number, since it uses as much as digits as its factorization.

161214997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 40.

The square root of 161214997 is about 12697.0467826184. The cubic root of 161214997 is about 544.2542300842.

The spelling of 161214997 in words is "one hundred sixty-one million, two hundred fourteen thousand, nine hundred ninety-seven".