68694149 has 4 divisors (see below), whose sum is σ = 68857740. Its totient is φ = 68530560.

The previous prime is 68694137. The next prime is 68694167. The reversal of 68694149 is 94149686.

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 2 ways, for example, as 14303524 + 54390625 = 3782^2 + 7375^2 .

It is a cyclic number.

It is not a de Polignac number, because 68694149 - 2²⁴ = 51916933 is a prime.

It is a super-2 number, since 2×68694149² = 9437772213668402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68694179) 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, 81164 + ... + 82005.

It is an arithmetic number, because the mean of its divisors is an integer number (17214435).

Almost surely, 2^68694149 is an apocalyptic number.

It is an amenable number.

68694149 is a deficient number, since it is larger than the sum of its proper divisors (163591).

68694149 is a wasteful number, since it uses less digits than its factorization.

68694149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163590.

The product of its digits is 373248, while the sum is 47.

The square root of 68694149 is about 8288.1933495787. The cubic root of 68694149 is about 409.5496721262.

The spelling of 68694149 in words is "sixty-eight million, six hundred ninety-four thousand, one hundred forty-nine".