612940186 has 4 divisors (see below), whose sum is σ = 919410282. Its totient is φ = 306470092.

The previous prime is 612940169. The next prime is 612940199. The reversal of 612940186 is 681049216.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 384356025 + 228584161 = 19605^2 + 15119^2 .

It is a super-2 number, since 2×612940186² = 751391343227429192, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153235045 + ... + 153235048.

Almost surely, 2^612940186 is an apocalyptic number.

612940186 is a deficient number, since it is larger than the sum of its proper divisors (306470096).

612940186 is a wasteful number, since it uses less digits than its factorization.

612940186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306470095.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 612940186 is about 24757.6288444592. The cubic root of 612940186 is about 849.4530211025.

The spelling of 612940186 in words is "six hundred twelve million, nine hundred forty thousand, one hundred eighty-six".