61970161 has 4 divisors (see below), whose sum is σ = 67603824. Its totient is φ = 56336500.

The previous prime is 61970137. The next prime is 61970173. The reversal of 61970161 is 16107916.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61970161 - 2⁷ = 61970033 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61970101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2816815 + ... + 2816836.

It is an arithmetic number, because the mean of its divisors is an integer number (16900956).

Almost surely, 2^61970161 is an apocalyptic number.

It is an amenable number.

61970161 is a deficient number, since it is larger than the sum of its proper divisors (5633663).

61970161 is a wasteful number, since it uses less digits than its factorization.

61970161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5633662.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 61970161 is about 7872.1128675852. The cubic root of 61970161 is about 395.7256564095.

The spelling of 61970161 in words is "sixty-one million, nine hundred seventy thousand, one hundred sixty-one".