137898049 has 3 divisors (see below), whose sum is σ = 137909793. Its totient is φ = 137886306.

The previous prime is 137898043. The next prime is 137898077. The reversal of 137898049 is 940898731.

It is a happy number.

The square root of 137898049 is 11743.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 137898049 - 2¹⁵ = 137865281 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 137897993 and 137898011.

It is not an unprimeable number, because it can be changed into a prime (137898043) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5872 + ... + 17614.

It is an arithmetic number, because the mean of its divisors is an integer number (45969931).

Almost surely, 2^137898049 is an apocalyptic number.

137898049 is the 11743-rd square number.

137898049 is the 5872-nd centered octagonal number.

It is an amenable number.

137898049 is a deficient number, since it is larger than the sum of its proper divisors (11744).

137898049 is an frugal number, since it uses more digits than its factorization.

137898049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23486 (or 11743 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 49.

The cubic root of 137898049 is about 516.6376361536.

Multiplying 137898049 by its sum of digits (49), we get a square (6757004401 = 82201²).

The spelling of 137898049 in words is "one hundred thirty-seven million, eight hundred ninety-eight thousand, forty-nine".