83147961 has 16 divisors (see below), whose sum is σ = 120061760. Its totient is φ = 50880960.

The previous prime is 83147957. The next prime is 83148011. The reversal of 83147961 is 16974138.

It is not a de Polignac number, because 83147961 - 2² = 83147957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (83147261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1170 + ... + 12948.

It is an arithmetic number, because the mean of its divisors is an integer number (7503860).

Almost surely, 2^83147961 is an apocalyptic number.

It is an amenable number.

83147961 is a deficient number, since it is larger than the sum of its proper divisors (36913799).

83147961 is a wasteful number, since it uses less digits than its factorization.

83147961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11976.

The product of its digits is 36288, while the sum is 39.

The square root of 83147961 is about 9118.5503782125. The cubic root of 83147961 is about 436.4661166226.

The spelling of 83147961 in words is "eighty-three million, one hundred forty-seven thousand, nine hundred sixty-one".