137999430 has 32 divisors (see below), whose sum is σ = 367999200. Its totient is φ = 36799776.

The previous prime is 137999423. The next prime is 137999437. The reversal of 137999430 is 34999731.

It is an interprime number because it is at equal distance from previous prime (137999423) and next prime (137999437).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137999437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255285 + ... + 255824.

It is an arithmetic number, because the mean of its divisors is an integer number (11499975).

Almost surely, 2^137999430 is an apocalyptic number.

137999430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

137999430 is an abundant number, since it is smaller than the sum of its proper divisors (229999770).

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

137999430 is a wasteful number, since it uses less digits than its factorization.

137999430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511125 (or 511119 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The square root of 137999430 is about 11747.3158636346. The cubic root of 137999430 is about 516.7642137474.

The spelling of 137999430 in words is "one hundred thirty-seven million, nine hundred ninety-nine thousand, four hundred thirty".