137849997 has 8 divisors (see below), whose sum is σ = 193473760. Its totient is φ = 87063120.

The previous prime is 137849989. The next prime is 137850047. The reversal of 137849997 is 799948731.

137849997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 137849997 - 2³ = 137849989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57), and also a Moran number because the ratio is a prime number: 2418421 = 137849997 / (1 + 3 + 7 + 8 + 4 + 9 + 9 + 9 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137849797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1209154 + ... + 1209267.

It is an arithmetic number, because the mean of its divisors is an integer number (24184220).

Almost surely, 2^137849997 is an apocalyptic number.

It is an amenable number.

137849997 is a deficient number, since it is larger than the sum of its proper divisors (55623763).

137849997 is a wasteful number, since it uses less digits than its factorization.

137849997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2418443.

The product of its digits is 3429216, while the sum is 57.

The square root of 137849997 is about 11740.9538368908. The cubic root of 137849997 is about 516.5776199411.

The spelling of 137849997 in words is "one hundred thirty-seven million, eight hundred forty-nine thousand, nine hundred ninety-seven".