137768426 has 4 divisors (see below), whose sum is σ = 206652642. Its totient is φ = 68884212.

The previous prime is 137768417. The next prime is 137768437. The reversal of 137768426 is 624867731.

137768426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 133379401 + 4389025 = 11549^2 + 2095^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34442105 + ... + 34442108.

Almost surely, 2^137768426 is an apocalyptic number.

137768426 is a deficient number, since it is larger than the sum of its proper divisors (68884216).

137768426 is an equidigital number, since it uses as much as digits as its factorization.

137768426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68884215.

The product of its digits is 338688, while the sum is 44.

The square root of 137768426 is about 11737.4795420482. The cubic root of 137768426 is about 516.4757070692.

The spelling of 137768426 in words is "one hundred thirty-seven million, seven hundred sixty-eight thousand, four hundred twenty-six".