149620187 has 2 divisors, whose sum is σ = 149620188. Its totient is φ = 149620186.

The previous prime is 149620183. The next prime is 149620201. The reversal of 149620187 is 781026941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 149620187 - 2² = 149620183 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 149620187.

It is not a weakly prime, because it can be changed into another prime (149620181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74810093 + 74810094.

It is an arithmetic number, because the mean of its divisors is an integer number (74810094).

Almost surely, 2^149620187 is an apocalyptic number.

149620187 is a deficient number, since it is larger than the sum of its proper divisors (1).

149620187 is an equidigital number, since it uses as much as digits as its factorization.

149620187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 149620187 is about 12231.9330851669. The cubic root of 149620187 is about 530.8804482814.

It can be divided in two parts, 149620 and 187, that multiplied together give a triangular number (27978940 = T₇₄₈₀).

The spelling of 149620187 in words is "one hundred forty-nine million, six hundred twenty thousand, one hundred eighty-seven".