73961861 has 6 divisors (see below), whose sum is σ = 76560210. Its totient is φ = 71366736.

The previous prime is 73961857. The next prime is 73961863. The reversal of 73961861 is 16816937.

It can be written as a sum of positive squares in 3 ways, for example, as 516961 + 73444900 = 719^2 + 8570^2 .

It is not a de Polignac number, because 73961861 - 2² = 73961857 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73961863) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45515 + ... + 47111.

It is an arithmetic number, because the mean of its divisors is an integer number (12760035).

Almost surely, 2^73961861 is an apocalyptic number.

It is an amenable number.

73961861 is a deficient number, since it is larger than the sum of its proper divisors (2598349).

73961861 is an frugal number, since it uses more digits than its factorization.

73961861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3223 (or 1626 counting only the distinct ones).

The product of its digits is 54432, while the sum is 41.

The square root of 73961861 is about 8600.1081969938. The cubic root of 73961861 is about 419.7615067006.

The spelling of 73961861 in words is "seventy-three million, nine hundred sixty-one thousand, eight hundred sixty-one".