137222779 has 4 divisors (see below), whose sum is σ = 137362240. Its totient is φ = 137083320.

The previous prime is 137222737. The next prime is 137222783. The reversal of 137222779 is 977222731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 977222731 = 47 ⋅20791973.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137222779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137222179) 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, 68244 + ... + 70225.

It is an arithmetic number, because the mean of its divisors is an integer number (34340560).

Almost surely, 2^137222779 is an apocalyptic number.

137222779 is a deficient number, since it is larger than the sum of its proper divisors (139461).

137222779 is an equidigital number, since it uses as much as digits as its factorization.

137222779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139460.

The product of its digits is 74088, while the sum is 40.

The square root of 137222779 is about 11714.2126922811. The cubic root of 137222779 is about 515.7929519558.

The spelling of 137222779 in words is "one hundred thirty-seven million, two hundred twenty-two thousand, seven hundred seventy-nine".