61964187 has 8 divisors (see below), whose sum is σ = 86967360. Its totient is φ = 39135240.

The previous prime is 61964171. The next prime is 61964239. The reversal of 61964187 is 78146916.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61964187 - 2⁴ = 61964171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61964107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 543489 + ... + 543602.

It is an arithmetic number, because the mean of its divisors is an integer number (10870920).

Almost surely, 2^61964187 is an apocalyptic number.

61964187 is a deficient number, since it is larger than the sum of its proper divisors (25003173).

61964187 is a wasteful number, since it uses less digits than its factorization.

61964187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087113.

The product of its digits is 72576, while the sum is 42.

The square root of 61964187 is about 7871.7334177422. The cubic root of 61964187 is about 395.7129398536.

The spelling of 61964187 in words is "sixty-one million, nine hundred sixty-four thousand, one hundred eighty-seven".