149499551 has 2 divisors, whose sum is σ = 149499552. Its totient is φ = 149499550.

The previous prime is 149499523. The next prime is 149499599. The reversal of 149499551 is 155994941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 149499551 - 2⁶ = 149499487 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 149499496 and 149499505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149496551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74749775 + 74749776.

It is an arithmetic number, because the mean of its divisors is an integer number (74749776).

Almost surely, 2^149499551 is an apocalyptic number.

149499551 is a deficient number, since it is larger than the sum of its proper divisors (1).

149499551 is an equidigital number, since it uses as much as digits as its factorization.

149499551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 291600, while the sum is 47.

The square root of 149499551 is about 12227.0008996483. Note that the first 3 decimals coincide. The cubic root of 149499551 is about 530.7377302095.

The spelling of 149499551 in words is "one hundred forty-nine million, four hundred ninety-nine thousand, five hundred fifty-one".