137779690 has 8 divisors (see below), whose sum is σ = 248003460. Its totient is φ = 55111872.

The previous prime is 137779669. The next prime is 137779699. The reversal of 137779690 is 96977731.

137779690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 134165889 + 3613801 = 11583^2 + 1901^2 .

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

It is a super-2 number, since 2×137779690² = 37966485952992200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (137779699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6888975 + ... + 6888994.

Almost surely, 2^137779690 is an apocalyptic number.

137779690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

137779690 is a deficient number, since it is larger than the sum of its proper divisors (110223770).

137779690 is a wasteful number, since it uses less digits than its factorization.

137779690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13777976.

The product of its (nonzero) digits is 500094, while the sum is 49.

The square root of 137779690 is about 11737.9593626831. The cubic root of 137779690 is about 516.4897824371.

The spelling of 137779690 in words is "one hundred thirty-seven million, seven hundred seventy-nine thousand, six hundred ninety".