149617951 has 16 divisors (see below), whose sum is σ = 180928000. Its totient is φ = 120862368.

The previous prime is 149617939. The next prime is 149617957. The reversal of 149617951 is 159716941.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 149617951 - 2²¹ = 147520799 is a prime.

It is a super-2 number, since 2×149617951² = 44771062522876802, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 149617898 and 149617907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149617957) 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, 23641 + ... + 29293.

It is an arithmetic number, because the mean of its divisors is an integer number (11308000).

Almost surely, 2^149617951 is an apocalyptic number.

149617951 is a deficient number, since it is larger than the sum of its proper divisors (31310049).

149617951 is a wasteful number, since it uses less digits than its factorization.

149617951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5878.

The product of its digits is 68040, while the sum is 43.

The square root of 149617951 is about 12231.8416847178. The cubic root of 149617951 is about 530.8778036859.

The spelling of 149617951 in words is "one hundred forty-nine million, six hundred seventeen thousand, nine hundred fifty-one".