68615949 has 4 divisors (see below), whose sum is σ = 91487936. Its totient is φ = 45743964.

The previous prime is 68615933. The next prime is 68615951. The reversal of 68615949 is 94951686.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 68615949 - 2⁴ = 68615933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68615898 and 68615907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68615929) 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, 11435989 + ... + 11435994.

It is an arithmetic number, because the mean of its divisors is an integer number (22871984).

Almost surely, 2^68615949 is an apocalyptic number.

It is an amenable number.

68615949 is a deficient number, since it is larger than the sum of its proper divisors (22871987).

68615949 is a wasteful number, since it uses less digits than its factorization.

68615949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22871986.

The product of its digits is 466560, while the sum is 48.

The square root of 68615949 is about 8283.4744521849. The cubic root of 68615949 is about 409.3942054894.

The spelling of 68615949 in words is "sixty-eight million, six hundred fifteen thousand, nine hundred forty-nine".