137689403 has 2 divisors, whose sum is σ = 137689404. Its totient is φ = 137689402.

The previous prime is 137689399. The next prime is 137689423. The reversal of 137689403 is 304986731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 137689403 - 2² = 137689399 is a prime.

It is not a weakly prime, because it can be changed into another prime (137689423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68844701 + 68844702.

It is an arithmetic number, because the mean of its divisors is an integer number (68844702).

Almost surely, 2^137689403 is an apocalyptic number.

137689403 is a deficient number, since it is larger than the sum of its proper divisors (1).

137689403 is an equidigital number, since it uses as much as digits as its factorization.

137689403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 137689403 is about 11734.1127913447. The cubic root of 137689403 is about 516.3769392385.

The spelling of 137689403 in words is "one hundred thirty-seven million, six hundred eighty-nine thousand, four hundred three".