31420947 has 12 divisors (see below), whose sum is σ = 44505176. Its totient is φ = 19714560.

The previous prime is 31420903. The next prime is 31420951. The reversal of 31420947 is 74902413.

It is a happy number.

It is not a de Polignac number, because 31420947 - 2¹¹ = 31418899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31420447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17254 + ... + 18987.

Almost surely, 2^31420947 is an apocalyptic number.

31420947 is a deficient number, since it is larger than the sum of its proper divisors (13084229).

31420947 is a wasteful number, since it uses less digits than its factorization.

31420947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36278 (or 36261 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 31420947 is about 5605.4390550607. The cubic root of 31420947 is about 315.5535642925.

The spelling of 31420947 in words is "thirty-one million, four hundred twenty thousand, nine hundred forty-seven".