137491000 has 32 divisors (see below), whose sum is σ = 321731280. Its totient is φ = 54996000.

The previous prime is 137490971. The next prime is 137491007. The reversal of 137491000 is 194731.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137491007) 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, 67746 + ... + 69745.

Almost surely, 2^137491000 is an apocalyptic number.

137491000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

137491000 is an abundant number, since it is smaller than the sum of its proper divisors (184240280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

137491000 is a wasteful number, since it uses less digits than its factorization.

137491000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137512 (or 137498 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 137491000 is about 11725.6556319892. The cubic root of 137491000 is about 516.1287962449.

The spelling of 137491000 in words is "one hundred thirty-seven million, four hundred ninety-one thousand".