161139607 has 2 divisors, whose sum is σ = 161139608. Its totient is φ = 161139606.

The previous prime is 161139527. The next prime is 161139637. The reversal of 161139607 is 706931161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161139607 - 2⁷ = 161139479 is a prime.

It is a super-2 number, since 2×161139607² = 51931945888228898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161139637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80569803 + 80569804.

It is an arithmetic number, because the mean of its divisors is an integer number (80569804).

Almost surely, 2^161139607 is an apocalyptic number.

161139607 is a deficient number, since it is larger than the sum of its proper divisors (1).

161139607 is an equidigital number, since it uses as much as digits as its factorization.

161139607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 161139607 is about 12694.0776348658. The cubic root of 161139607 is about 544.1693791610.

The spelling of 161139607 in words is "one hundred sixty-one million, one hundred thirty-nine thousand, six hundred seven".